/**
 * Super simple wysiwyg editor v0.7.3
 * http://summernote.org/
 *
 * summernote.js
 * Copyright 2013-2015 Alan Hong. and other contributors
 * summernote may be freely distributed under the MIT license./
 *
 * Date: 2016-01-14T13:17Z
 */
(function(factory) {
	/* global define */
	if (typeof define === 'function' && define.amd) {
		// AMD. Register as an anonymous module.
		define(['jquery'], factory);
	} else if (typeof module === 'object' && module.exports) {
		// Node/CommonJS
		module.exports = factory(require('jquery'));
	} else {
		// Browser globals
		factory(window.jQuery);
	}
}(function($) {
	'use strict';

	/**
	 * @class core.func
	 *
	 * func utils (for high-order func's arg)
	 *
	 * @singleton
	 * @alternateClassName func
	 */
	var func = (function() {
		var eq = function(itemA) {
			return function(itemB) {
				return itemA === itemB;
			};
		};

		var eq2 = function(itemA, itemB) {
			return itemA === itemB;
		};

		var peq2 = function(propName) {
			return function(itemA, itemB) {
				return itemA[propName] === itemB[propName];
			};
		};

		var ok = function() {
			return true;
		};

		var fail = function() {
			return false;
		};

		var not = function(f) {
			return function() {
				return !f.apply(f, arguments);
			};
		};

		var and = function(fA, fB) {
			return function(item) {
				return fA(item) && fB(item);
			};
		};

		var self = function(a) {
			return a;
		};

		var invoke = function(obj, method) {
			return function() {
				return obj[method].apply(obj, arguments);
			};
		};

		var idCounter = 0;

		/**
		 * generate a globally-unique id
		 *
		 * @param {String} [prefix]
		 */
		var uniqueId = function(prefix) {
			var id = ++idCounter + '';
			return prefix ? prefix + id : id;
		};

		/**
		 * returns bnd (bounds) from rect
		 *
		 * - IE Compatability Issue: http://goo.gl/sRLOAo
		 * - Scroll Issue: http://goo.gl/sNjUc
		 *
		 * @param {Rect} rect
		 * @return {Object} bounds
		 * @return {Number} bounds.top
		 * @return {Number} bounds.left
		 * @return {Number} bounds.width
		 * @return {Number} bounds.height
		 */
		var rect2bnd = function(rect) {
			var $document = $(document);
			return {
				top: rect.top + $document.scrollTop(),
				left: rect.left + $document.scrollLeft(),
				width: rect.right - rect.left,
				height: rect.bottom - rect.top
			};
		};

		/**
		 * returns a copy of the object where the keys have become the values and the values the keys.
		 * @param {Object} obj
		 * @return {Object}
		 */
		var invertObject = function(obj) {
			var inverted = {};
			for (var key in obj) {
				if (obj.hasOwnProperty(key)) {
					inverted[obj[key]] = key;
				}
			}
			return inverted;
		};

		/**
		 * @param {String} namespace
		 * @param {String} [prefix]
		 * @return {String}
		 */
		var namespaceToCamel = function(namespace, prefix) {
			prefix = prefix || '';
			return prefix + namespace.split('.').map(function(name) {
				return name.substring(0, 1).toUpperCase() + name.substring(1);
			}).join('');
		};

		return {
			eq: eq,
			eq2: eq2,
			peq2: peq2,
			ok: ok,
			fail: fail,
			self: self,
			not: not,
			and: and,
			invoke: invoke,
			uniqueId: uniqueId,
			rect2bnd: rect2bnd,
			invertObject: invertObject,
			namespaceToCamel: namespaceToCamel
		};
	})();

	/**
	 * @class core.list
	 *
	 * list utils
	 *
	 * @singleton
	 * @alternateClassName list
	 */
	var list = (function() {
		/**
		 * returns the first item of an array.
		 *
		 * @param {Array} array
		 */
		var head = function(array) {
			return array[0];
		};

		/**
		 * returns the last item of an array.
		 *
		 * @param {Array} array
		 */
		var last = function(array) {
			return array[array.length - 1];
		};

		/**
		 * returns everything but the last entry of the array.
		 *
		 * @param {Array} array
		 */
		var initial = function(array) {
			return array.slice(0, array.length - 1);
		};

		/**
		 * returns the rest of the items in an array.
		 *
		 * @param {Array} array
		 */
		var tail = function(array) {
			return array.slice(1);
		};

		/**
		 * returns item of array
		 */
		var find = function(array, pred) {
			for (var idx = 0, len = array.length; idx < len; idx++) {
				var item = array[idx];
				if (pred(item)) {
					return item;
				}
			}
		};

		/**
		 * returns true if all of the values in the array pass the predicate truth test.
		 */
		var all = function(array, pred) {
			for (var idx = 0, len = array.length; idx < len; idx++) {
				if (!pred(array[idx])) {
					return false;
				}
			}
			return true;
		};

		/**
		 * returns index of item
		 */
		var indexOf = function(array, item) {
			return $.inArray(item, array);
		};

		/**
		 * returns true if the value is present in the list.
		 */
		var contains = function(array, item) {
			return indexOf(array, item) !== -1;
		};

		/**
		 * get sum from a list
		 *
		 * @param {Array} array - array
		 * @param {Function} fn - iterator
		 */
		var sum = function(array, fn) {
			fn = fn || func.self;
			return array.reduce(function(memo, v) {
				return memo + fn(v);
			}, 0);
		};

		/**
		 * returns a copy of the collection with array type.
		 * @param {Collection} collection - collection eg) node.childNodes, ...
		 */
		var from = function(collection) {
			var result = [],
				idx = -1,
				length = collection.length;
			while (++idx < length) {
				result[idx] = collection[idx];
			}
			return result;
		};

		/**
		 * returns whether list is empty or not
		 */
		var isEmpty = function(array) {
			return !array || !array.length;
		};

		/**
		 * cluster elements by predicate function.
		 *
		 * @param {Array} array - array
		 * @param {Function} fn - predicate function for cluster rule
		 * @param {Array[]}
		 */
		var clusterBy = function(array, fn) {
			if (!array.length) {
				return [];
			}
			var aTail = tail(array);
			return aTail.reduce(function(memo, v) {
				var aLast = last(memo);
				if (fn(last(aLast), v)) {
					aLast[aLast.length] = v;
				} else {
					memo[memo.length] = [v];
				}
				return memo;
			}, [
				[head(array)]
			]);
		};

		/**
		 * returns a copy of the array with all falsy values removed
		 *
		 * @param {Array} array - array
		 * @param {Function} fn - predicate function for cluster rule
		 */
		var compact = function(array) {
			var aResult = [];
			for (var idx = 0, len = array.length; idx < len; idx++) {
				if (array[idx]) {
					aResult.push(array[idx]);
				}
			}
			return aResult;
		};

		/**
		 * produces a duplicate-free version of the array
		 *
		 * @param {Array} array
		 */
		var unique = function(array) {
			var results = [];

			for (var idx = 0, len = array.length; idx < len; idx++) {
				if (!contains(results, array[idx])) {
					results.push(array[idx]);
				}
			}

			return results;
		};

		/**
		 * returns next item.
		 * @param {Array} array
		 */
		var next = function(array, item) {
			var idx = indexOf(array, item);
			if (idx === -1) {
				return null;
			}

			return array[idx + 1];
		};

		/**
		 * returns prev item.
		 * @param {Array} array
		 */
		var prev = function(array, item) {
			var idx = indexOf(array, item);
			if (idx === -1) {
				return null;
			}

			return array[idx - 1];
		};

		return {
			head: head,
			last: last,
			initial: initial,
			tail: tail,
			prev: prev,
			next: next,
			find: find,
			contains: contains,
			all: all,
			sum: sum,
			from: from,
			isEmpty: isEmpty,
			clusterBy: clusterBy,
			compact: compact,
			unique: unique
		};
	})();

	var isSupportAmd = typeof define === 'function' && define.amd;

	/**
	 * returns whether font is installed or not.
	 *
	 * @param {String} fontName
	 * @return {Boolean}
	 */
	var isFontInstalled = function(fontName) {
		var testFontName = fontName === 'Comic Sans MS' ? 'Courier New' : 'Comic Sans MS';
		var $tester = $('<div>').css({
			position: 'absolute',
			left: '-9999px',
			top: '-9999px',
			fontSize: '200px'
		}).text('mmmmmmmmmwwwwwww').appendTo(document.body);

		var originalWidth = $tester.css('fontFamily', testFontName).width();
		var width = $tester.css('fontFamily', fontName + ',' + testFontName).width();

		$tester.remove();

		return originalWidth !== width;
	};

	var userAgent = navigator.userAgent;
	var isMSIE = /MSIE|Trident/i.test(userAgent);
	var browserVersion;
	if (isMSIE) {
		var matches = /MSIE (\d+[.]\d+)/.exec(userAgent);
		if (matches) {
			browserVersion = parseFloat(matches[1]);
		}
		matches = /Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/.exec(userAgent);
		if (matches) {
			browserVersion = parseFloat(matches[1]);
		}
	}

	/**
	 * @class core.agent
	 *
	 * Object which check platform and agent
	 *
	 * @singleton
	 * @alternateClassName agent
	 */
	var agent = {
		isMac: navigator.appVersion.indexOf('Mac') > -1,
		isMSIE: isMSIE,
		isFF: /firefox/i.test(userAgent),
		isWebkit: /webkit/i.test(userAgent),
		isSafari: /safari/i.test(userAgent),
		browserVersion: browserVersion,
		jqueryVersion: parseFloat($.fn.jquery),
		isSupportAmd: isSupportAmd,
		hasCodeMirror: isSupportAmd ? require.specified('codemirror') : !!window.CodeMirror,
		isFontInstalled: isFontInstalled,
		isW3CRangeSupport: !!document.createRange
	};


	var NBSP_CHAR = String.fromCharCode(160);
	var ZERO_WIDTH_NBSP_CHAR = '\ufeff';

	/**
	 * @class core.dom
	 *
	 * Dom functions
	 *
	 * @singleton
	 * @alternateClassName dom
	 */
	var dom = (function() {
		/**
		 * @method isEditable
		 *
		 * returns whether node is `note-editable` or not.
		 *
		 * @param {Node} node
		 * @return {Boolean}
		 */
		var isEditable = function(node) {
			return node && $(node).hasClass('note-editable');
		};

		/**
		 * @method isControlSizing
		 *
		 * returns whether node is `note-control-sizing` or not.
		 *
		 * @param {Node} node
		 * @return {Boolean}
		 */
		var isControlSizing = function(node) {
			return node && $(node).hasClass('note-control-sizing');
		};

		/**
		 * @method makePredByNodeName
		 *
		 * returns predicate which judge whether nodeName is same
		 *
		 * @param {String} nodeName
		 * @return {Function}
		 */
		var makePredByNodeName = function(nodeName) {
			nodeName = nodeName.toUpperCase();
			return function(node) {
				return node && node.nodeName.toUpperCase() === nodeName;
			};
		};

		/**
		 * @method isText
		 *
		 *
		 *
		 * @param {Node} node
		 * @return {Boolean} true if node's type is text(3)
		 */
		var isText = function(node) {
			return node && node.nodeType === 3;
		};

		/**
		 * @method isElement
		 *
		 *
		 *
		 * @param {Node} node
		 * @return {Boolean} true if node's type is element(1)
		 */
		var isElement = function(node) {
			return node && node.nodeType === 1;
		};

		/**
		 * ex) br, col, embed, hr, img, input, ...
		 * @see http://www.w3.org/html/wg/drafts/html/master/syntax.html#void-elements
		 */
		var isVoid = function(node) {
			return node && /^BR|^IMG|^HR|^IFRAME|^BUTTON/.test(node.nodeName.toUpperCase());
		};

		var isPara = function(node) {
			if (isEditable(node)) {
				return false;
			}

			// Chrome(v31.0), FF(v25.0.1) use DIV for paragraph
			return node && /^DIV|^P|^LI|^H[1-7]/.test(node.nodeName.toUpperCase());
		};

		var isHeading = function(node) {
			return node && /^H[1-7]/.test(node.nodeName.toUpperCase());
		};

		var isPre = makePredByNodeName('PRE');

		var isLi = makePredByNodeName('LI');

		var isPurePara = function(node) {
			return isPara(node) && !isLi(node);
		};

		var isTable = makePredByNodeName('TABLE');

		var isInline = function(node) {
			return !isBodyContainer(node) &&
				!isList(node) &&
				!isHr(node) &&
				!isPara(node) &&
				!isTable(node) &&
				!isBlockquote(node);
		};

		var isList = function(node) {
			return node && /^UL|^OL/.test(node.nodeName.toUpperCase());
		};

		var isHr = makePredByNodeName('HR');

		var isCell = function(node) {
			return node && /^TD|^TH/.test(node.nodeName.toUpperCase());
		};

		var isBlockquote = makePredByNodeName('BLOCKQUOTE');

		var isBodyContainer = function(node) {
			return isCell(node) || isBlockquote(node) || isEditable(node);
		};

		var isAnchor = makePredByNodeName('A');

		var isParaInline = function(node) {
			return isInline(node) && !!ancestor(node, isPara);
		};

		var isBodyInline = function(node) {
			return isInline(node) && !ancestor(node, isPara);
		};

		var isBody = makePredByNodeName('BODY');

		/**
		 * returns whether nodeB is closest sibling of nodeA
		 *
		 * @param {Node} nodeA
		 * @param {Node} nodeB
		 * @return {Boolean}
		 */
		var isClosestSibling = function(nodeA, nodeB) {
			return nodeA.nextSibling === nodeB ||
				nodeA.previousSibling === nodeB;
		};

		/**
		 * returns array of closest siblings with node
		 *
		 * @param {Node} node
		 * @param {function} [pred] - predicate function
		 * @return {Node[]}
		 */
		var withClosestSiblings = function(node, pred) {
			pred = pred || func.ok;

			var siblings = [];
			if (node.previousSibling && pred(node.previousSibling)) {
				siblings.push(node.previousSibling);
			}
			siblings.push(node);
			if (node.nextSibling && pred(node.nextSibling)) {
				siblings.push(node.nextSibling);
			}
			return siblings;
		};

		/**
		 * blank HTML for cursor position
		 * - [workaround] old IE only works with &nbsp;
		 * - [workaround] IE11 and other browser works with bogus br
		 */
		var blankHTML = agent.isMSIE && agent.browserVersion < 11 ? '&nbsp;' : '<br>';

		/**
		 * @method nodeLength
		 *
		 * returns #text's text size or element's childNodes size
		 *
		 * @param {Node} node
		 */
		var nodeLength = function(node) {
			if (isText(node)) {
				return node.nodeValue.length;
			}

			return node.childNodes.length;
		};

		/**
		 * returns whether node is empty or not.
		 *
		 * @param {Node} node
		 * @return {Boolean}
		 */
		var isEmpty = function(node) {
			var len = nodeLength(node);

			if (len === 0) {
				return true;
			} else if (!isText(node) && len === 1 && node.innerHTML === blankHTML) {
				// ex) <p><br></p>, <span><br></span>
				return true;
			} else if (list.all(node.childNodes, isText) && node.innerHTML === '') {
				// ex) <p></p>, <span></span>
				return true;
			}

			return false;
		};

		/**
		 * padding blankHTML if node is empty (for cursor position)
		 */
		var paddingBlankHTML = function(node) {
			if (!isVoid(node) && !nodeLength(node)) {
				node.innerHTML = blankHTML;
			}
		};

		/**
		 * find nearest ancestor predicate hit
		 *
		 * @param {Node} node
		 * @param {Function} pred - predicate function
		 */
		var ancestor = function(node, pred) {
			while (node) {
				if (pred(node)) {
					return node;
				}
				if (isEditable(node)) {
					break;
				}

				node = node.parentNode;
			}
			return null;
		};

		/**
		 * find nearest ancestor only single child blood line and predicate hit
		 *
		 * @param {Node} node
		 * @param {Function} pred - predicate function
		 */
		var singleChildAncestor = function(node, pred) {
			node = node.parentNode;

			while (node) {
				if (nodeLength(node) !== 1) {
					break;
				}
				if (pred(node)) {
					return node;
				}
				if (isEditable(node)) {
					break;
				}

				node = node.parentNode;
			}
			return null;
		};

		/**
		 * returns new array of ancestor nodes (until predicate hit).
		 *
		 * @param {Node} node
		 * @param {Function} [optional] pred - predicate function
		 */
		var listAncestor = function(node, pred) {
			pred = pred || func.fail;

			var ancestors = [];
			ancestor(node, function(el) {
				if (!isEditable(el)) {
					ancestors.push(el);
				}

				return pred(el);
			});
			return ancestors;
		};

		/**
		 * find farthest ancestor predicate hit
		 */
		var lastAncestor = function(node, pred) {
			var ancestors = listAncestor(node);
			return list.last(ancestors.filter(pred));
		};

		/**
		 * returns common ancestor node between two nodes.
		 *
		 * @param {Node} nodeA
		 * @param {Node} nodeB
		 */
		var commonAncestor = function(nodeA, nodeB) {
			var ancestors = listAncestor(nodeA);
			for (var n = nodeB; n; n = n.parentNode) {
				if ($.inArray(n, ancestors) > -1) {
					return n;
				}
			}
			return null; // difference document area
		};

		/**
		 * listing all previous siblings (until predicate hit).
		 *
		 * @param {Node} node
		 * @param {Function} [optional] pred - predicate function
		 */
		var listPrev = function(node, pred) {
			pred = pred || func.fail;

			var nodes = [];
			while (node) {
				if (pred(node)) {
					break;
				}
				nodes.push(node);
				node = node.previousSibling;
			}
			return nodes;
		};

		/**
		 * listing next siblings (until predicate hit).
		 *
		 * @param {Node} node
		 * @param {Function} [pred] - predicate function
		 */
		var listNext = function(node, pred) {
			pred = pred || func.fail;

			var nodes = [];
			while (node) {
				if (pred(node)) {
					break;
				}
				nodes.push(node);
				node = node.nextSibling;
			}
			return nodes;
		};

		/**
		 * listing descendant nodes
		 *
		 * @param {Node} node
		 * @param {Function} [pred] - predicate function
		 */
		var listDescendant = function(node, pred) {
			var descendents = [];
			pred = pred || func.ok;

			// start DFS(depth first search) with node
			(function fnWalk(current) {
				if (node !== current && pred(current)) {
					descendents.push(current);
				}
				for (var idx = 0, len = current.childNodes.length; idx < len; idx++) {
					fnWalk(current.childNodes[idx]);
				}
			})(node);

			return descendents;
		};

		/**
		 * wrap node with new tag.
		 *
		 * @param {Node} node
		 * @param {Node} tagName of wrapper
		 * @return {Node} - wrapper
		 */
		var wrap = function(node, wrapperName) {
			var parent = node.parentNode;
			var wrapper = $('<' + wrapperName + '>')[0];

			parent.insertBefore(wrapper, node);
			wrapper.appendChild(node);

			return wrapper;
		};

		/**
		 * insert node after preceding
		 *
		 * @param {Node} node
		 * @param {Node} preceding - predicate function
		 */
		var insertAfter = function(node, preceding) {
			var next = preceding.nextSibling,
				parent = preceding.parentNode;
			if (next) {
				parent.insertBefore(node, next);
			} else {
				parent.appendChild(node);
			}
			return node;
		};

		/**
		 * append elements.
		 *
		 * @param {Node} node
		 * @param {Collection} aChild
		 */
		var appendChildNodes = function(node, aChild) {
			$.each(aChild, function(idx, child) {
				node.appendChild(child);
			});
			return node;
		};

		/**
		 * returns whether boundaryPoint is left edge or not.
		 *
		 * @param {BoundaryPoint} point
		 * @return {Boolean}
		 */
		var isLeftEdgePoint = function(point) {
			return point.offset === 0;
		};

		/**
		 * returns whether boundaryPoint is right edge or not.
		 *
		 * @param {BoundaryPoint} point
		 * @return {Boolean}
		 */
		var isRightEdgePoint = function(point) {
			return point.offset === nodeLength(point.node);
		};

		/**
		 * returns whether boundaryPoint is edge or not.
		 *
		 * @param {BoundaryPoint} point
		 * @return {Boolean}
		 */
		var isEdgePoint = function(point) {
			return isLeftEdgePoint(point) || isRightEdgePoint(point);
		};

		/**
		 * returns wheter node is left edge of ancestor or not.
		 *
		 * @param {Node} node
		 * @param {Node} ancestor
		 * @return {Boolean}
		 */
		var isLeftEdgeOf = function(node, ancestor) {
			while (node && node !== ancestor) {
				if (position(node) !== 0) {
					return false;
				}
				node = node.parentNode;
			}

			return true;
		};

		/**
		 * returns whether node is right edge of ancestor or not.
		 *
		 * @param {Node} node
		 * @param {Node} ancestor
		 * @return {Boolean}
		 */
		var isRightEdgeOf = function(node, ancestor) {
			while (node && node !== ancestor) {
				if (position(node) !== nodeLength(node.parentNode) - 1) {
					return false;
				}
				node = node.parentNode;
			}

			return true;
		};

		/**
		 * returns whether point is left edge of ancestor or not.
		 * @param {BoundaryPoint} point
		 * @param {Node} ancestor
		 * @return {Boolean}
		 */
		var isLeftEdgePointOf = function(point, ancestor) {
			return isLeftEdgePoint(point) && isLeftEdgeOf(point.node, ancestor);
		};

		/**
		 * returns whether point is right edge of ancestor or not.
		 * @param {BoundaryPoint} point
		 * @param {Node} ancestor
		 * @return {Boolean}
		 */
		var isRightEdgePointOf = function(point, ancestor) {
			return isRightEdgePoint(point) && isRightEdgeOf(point.node, ancestor);
		};

		/**
		 * returns offset from parent.
		 *
		 * @param {Node} node
		 */
		var position = function(node) {
			var offset = 0;
			while ((node = node.previousSibling)) {
				offset += 1;
			}
			return offset;
		};

		var hasChildren = function(node) {
			return !!(node && node.childNodes && node.childNodes.length);
		};

		/**
		 * returns previous boundaryPoint
		 *
		 * @param {BoundaryPoint} point
		 * @param {Boolean} isSkipInnerOffset
		 * @return {BoundaryPoint}
		 */
		var prevPoint = function(point, isSkipInnerOffset) {
			var node, offset;

			if (point.offset === 0) {
				if (isEditable(point.node)) {
					return null;
				}

				node = point.node.parentNode;
				offset = position(point.node);
			} else if (hasChildren(point.node)) {
				node = point.node.childNodes[point.offset - 1];
				offset = nodeLength(node);
			} else {
				node = point.node;
				offset = isSkipInnerOffset ? 0 : point.offset - 1;
			}

			return {
				node: node,
				offset: offset
			};
		};

		/**
		 * returns next boundaryPoint
		 *
		 * @param {BoundaryPoint} point
		 * @param {Boolean} isSkipInnerOffset
		 * @return {BoundaryPoint}
		 */
		var nextPoint = function(point, isSkipInnerOffset) {
			var node, offset;

			if (nodeLength(point.node) === point.offset) {
				if (isEditable(point.node)) {
					return null;
				}

				node = point.node.parentNode;
				offset = position(point.node) + 1;
			} else if (hasChildren(point.node)) {
				node = point.node.childNodes[point.offset];
				offset = 0;
			} else {
				node = point.node;
				offset = isSkipInnerOffset ? nodeLength(point.node) : point.offset + 1;
			}

			return {
				node: node,
				offset: offset
			};
		};

		/**
		 * returns whether pointA and pointB is same or not.
		 *
		 * @param {BoundaryPoint} pointA
		 * @param {BoundaryPoint} pointB
		 * @return {Boolean}
		 */
		var isSamePoint = function(pointA, pointB) {
			return pointA.node === pointB.node && pointA.offset === pointB.offset;
		};

		/**
		 * returns whether point is visible (can set cursor) or not.
		 *
		 * @param {BoundaryPoint} point
		 * @return {Boolean}
		 */
		var isVisiblePoint = function(point) {
			if (isText(point.node) || !hasChildren(point.node) || isEmpty(point.node)) {
				return true;
			}

			var leftNode = point.node.childNodes[point.offset - 1];
			var rightNode = point.node.childNodes[point.offset];
			if ((!leftNode || isVoid(leftNode)) && (!rightNode || isVoid(rightNode))) {
				return true;
			}

			return false;
		};

		/**
		 * @method prevPointUtil
		 *
		 * @param {BoundaryPoint} point
		 * @param {Function} pred
		 * @return {BoundaryPoint}
		 */
		var prevPointUntil = function(point, pred) {
			while (point) {
				if (pred(point)) {
					return point;
				}

				point = prevPoint(point);
			}

			return null;
		};

		/**
		 * @method nextPointUntil
		 *
		 * @param {BoundaryPoint} point
		 * @param {Function} pred
		 * @return {BoundaryPoint}
		 */
		var nextPointUntil = function(point, pred) {
			while (point) {
				if (pred(point)) {
					return point;
				}

				point = nextPoint(point);
			}

			return null;
		};

		/**
		 * returns whether point has character or not.
		 *
		 * @param {Point} point
		 * @return {Boolean}
		 */
		var isCharPoint = function(point) {
			if (!isText(point.node)) {
				return false;
			}

			var ch = point.node.nodeValue.charAt(point.offset - 1);
			return ch && (ch !== ' ' && ch !== NBSP_CHAR);
		};

		/**
		 * @method walkPoint
		 *
		 * @param {BoundaryPoint} startPoint
		 * @param {BoundaryPoint} endPoint
		 * @param {Function} handler
		 * @param {Boolean} isSkipInnerOffset
		 */
		var walkPoint = function(startPoint, endPoint, handler, isSkipInnerOffset) {
			var point = startPoint;

			while (point) {
				handler(point);

				if (isSamePoint(point, endPoint)) {
					break;
				}

				var isSkipOffset = isSkipInnerOffset &&
					startPoint.node !== point.node &&
					endPoint.node !== point.node;
				point = nextPoint(point, isSkipOffset);
			}
		};

		/**
		 * @method makeOffsetPath
		 *
		 * return offsetPath(array of offset) from ancestor
		 *
		 * @param {Node} ancestor - ancestor node
		 * @param {Node} node
		 */
		var makeOffsetPath = function(ancestor, node) {
			var ancestors = listAncestor(node, func.eq(ancestor));
			return ancestors.map(position).reverse();
		};

		/**
		 * @method fromOffsetPath
		 *
		 * return element from offsetPath(array of offset)
		 *
		 * @param {Node} ancestor - ancestor node
		 * @param {array} offsets - offsetPath
		 */
		var fromOffsetPath = function(ancestor, offsets) {
			var current = ancestor;
			for (var i = 0, len = offsets.length; i < len; i++) {
				if (current.childNodes.length <= offsets[i]) {
					current = current.childNodes[current.childNodes.length - 1];
				} else {
					current = current.childNodes[offsets[i]];
				}
			}
			return current;
		};

		/**
		 * @method splitNode
		 *
		 * split element or #text
		 *
		 * @param {BoundaryPoint} point
		 * @param {Object} [options]
		 * @param {Boolean} [options.isSkipPaddingBlankHTML] - default: false
		 * @param {Boolean} [options.isNotSplitEdgePoint] - default: false
		 * @return {Node} right node of boundaryPoint
		 */
		var splitNode = function(point, options) {
			var isSkipPaddingBlankHTML = options && options.isSkipPaddingBlankHTML;
			var isNotSplitEdgePoint = options && options.isNotSplitEdgePoint;

			// edge case
			if (isEdgePoint(point) && (isText(point.node) || isNotSplitEdgePoint)) {
				if (isLeftEdgePoint(point)) {
					return point.node;
				} else if (isRightEdgePoint(point)) {
					return point.node.nextSibling;
				}
			}

			// split #text
			if (isText(point.node)) {
				return point.node.splitText(point.offset);
			} else {
				var childNode = point.node.childNodes[point.offset];
				var clone = insertAfter(point.node.cloneNode(false), point.node);
				appendChildNodes(clone, listNext(childNode));

				if (!isSkipPaddingBlankHTML) {
					paddingBlankHTML(point.node);
					paddingBlankHTML(clone);
				}

				return clone;
			}
		};

		/**
		 * @method splitTree
		 *
		 * split tree by point
		 *
		 * @param {Node} root - split root
		 * @param {BoundaryPoint} point
		 * @param {Object} [options]
		 * @param {Boolean} [options.isSkipPaddingBlankHTML] - default: false
		 * @param {Boolean} [options.isNotSplitEdgePoint] - default: false
		 * @return {Node} right node of boundaryPoint
		 */
		var splitTree = function(root, point, options) {
			// ex) [#text, <span>, <p>]
			var ancestors = listAncestor(point.node, func.eq(root));

			if (!ancestors.length) {
				return null;
			} else if (ancestors.length === 1) {
				return splitNode(point, options);
			}

			return ancestors.reduce(function(node, parent) {
				if (node === point.node) {
					node = splitNode(point, options);
				}

				return splitNode({
					node: parent,
					offset: node ? dom.position(node) : nodeLength(parent)
				}, options);
			});
		};

		/**
		 * split point
		 *
		 * @param {Point} point
		 * @param {Boolean} isInline
		 * @return {Object}
		 */
		var splitPoint = function(point, isInline) {
			// find splitRoot, container
			//  - inline: splitRoot is a child of paragraph
			//  - block: splitRoot is a child of bodyContainer
			var pred = isInline ? isPara : isBodyContainer;
			var ancestors = listAncestor(point.node, pred);
			var topAncestor = list.last(ancestors) || point.node;

			var splitRoot, container;
			if (pred(topAncestor)) {
				splitRoot = ancestors[ancestors.length - 2];
				container = topAncestor;
			} else {
				splitRoot = topAncestor;
				container = splitRoot.parentNode;
			}

			// if splitRoot is exists, split with splitTree
			var pivot = splitRoot && splitTree(splitRoot, point, {
				isSkipPaddingBlankHTML: isInline,
				isNotSplitEdgePoint: isInline
			});

			// if container is point.node, find pivot with point.offset
			if (!pivot && container === point.node) {
				pivot = point.node.childNodes[point.offset];
			}

			return {
				rightNode: pivot,
				container: container
			};
		};

		var create = function(nodeName) {
			return document.createElement(nodeName);
		};

		var createText = function(text) {
			return document.createTextNode(text);
		};

		/**
		 * @method remove
		 *
		 * remove node, (isRemoveChild: remove child or not)
		 *
		 * @param {Node} node
		 * @param {Boolean} isRemoveChild
		 */
		var remove = function(node, isRemoveChild) {
			if (!node || !node.parentNode) {
				return;
			}
			if (node.removeNode) {
				return node.removeNode(isRemoveChild);
			}

			var parent = node.parentNode;
			if (!isRemoveChild) {
				var nodes = [];
				var i, len;
				for (i = 0, len = node.childNodes.length; i < len; i++) {
					nodes.push(node.childNodes[i]);
				}

				for (i = 0, len = nodes.length; i < len; i++) {
					parent.insertBefore(nodes[i], node);
				}
			}

			parent.removeChild(node);
		};

		/**
		 * @method removeWhile
		 *
		 * @param {Node} node
		 * @param {Function} pred
		 */
		var removeWhile = function(node, pred) {
			while (node) {
				if (isEditable(node) || !pred(node)) {
					break;
				}

				var parent = node.parentNode;
				remove(node);
				node = parent;
			}
		};

		/**
		 * @method replace
		 *
		 * replace node with provided nodeName
		 *
		 * @param {Node} node
		 * @param {String} nodeName
		 * @return {Node} - new node
		 */
		var replace = function(node, nodeName) {
			if (node.nodeName.toUpperCase() === nodeName.toUpperCase()) {
				return node;
			}

			var newNode = create(nodeName);

			if (node.style.cssText) {
				newNode.style.cssText = node.style.cssText;
			}

			appendChildNodes(newNode, list.from(node.childNodes));
			insertAfter(newNode, node);
			remove(node);

			return newNode;
		};

		var isTextarea = makePredByNodeName('TEXTAREA');

		/**
		 * @param {jQuery} $node
		 * @param {Boolean} [stripLinebreaks] - default: false
		 */
		var value = function($node, stripLinebreaks) {
			var val = isTextarea($node[0]) ? $node.val() : $node.html();
			if (stripLinebreaks) {
				return val.replace(/[\n\r]/g, '');
			}
			return val;
		};

		/**
		 * @method html
		 *
		 * get the HTML contents of node
		 *
		 * @param {jQuery} $node
		 * @param {Boolean} [isNewlineOnBlock]
		 */
		var html = function($node, isNewlineOnBlock) {
			var markup = value($node);

			if (isNewlineOnBlock) {
				var regexTag = /<(\/?)(\b(?!!)[^>\s]*)(.*?)(\s*\/?>)/g;
				markup = markup.replace(regexTag, function(match, endSlash, name) {
					name = name.toUpperCase();
					var isEndOfInlineContainer = /^DIV|^TD|^TH|^P|^LI|^H[1-7]/.test(name) &&
						!!endSlash;
					var isBlockNode = /^BLOCKQUOTE|^TABLE|^TBODY|^TR|^HR|^UL|^OL/.test(name);

					return match + ((isEndOfInlineContainer || isBlockNode) ? '\n' : '');
				});
				markup = $.trim(markup);
			}

			return markup;
		};

		var posFromPlaceholder = function(placeholder) {
			var $placeholder = $(placeholder);
			var pos = $placeholder.offset();
			var height = $placeholder.outerHeight(true); // include margin

			return {
				left: pos.left,
				top: pos.top + height
			};
		};

		var attachEvents = function($node, events) {
			Object.keys(events).forEach(function(key) {
				$node.on(key, events[key]);
			});
		};

		var detachEvents = function($node, events) {
			Object.keys(events).forEach(function(key) {
				$node.off(key, events[key]);
			});
		};

		return {
			/** @property {String} NBSP_CHAR */
			NBSP_CHAR: NBSP_CHAR,
			/** @property {String} ZERO_WIDTH_NBSP_CHAR */
			ZERO_WIDTH_NBSP_CHAR: ZERO_WIDTH_NBSP_CHAR,
			/** @property {String} blank */
			blank: blankHTML,
			/** @property {String} emptyPara */
			emptyPara: '<p>' + blankHTML + '</p>',
			makePredByNodeName: makePredByNodeName,
			isEditable: isEditable,
			isControlSizing: isControlSizing,
			isText: isText,
			isElement: isElement,
			isVoid: isVoid,
			isPara: isPara,
			isPurePara: isPurePara,
			isHeading: isHeading,
			isInline: isInline,
			isBlock: func.not(isInline),
			isBodyInline: isBodyInline,
			isBody: isBody,
			isParaInline: isParaInline,
			isPre: isPre,
			isList: isList,
			isTable: isTable,
			isCell: isCell,
			isBlockquote: isBlockquote,
			isBodyContainer: isBodyContainer,
			isAnchor: isAnchor,
			isDiv: makePredByNodeName('DIV'),
			isLi: isLi,
			isBR: makePredByNodeName('BR'),
			isSpan: makePredByNodeName('SPAN'),
			isB: makePredByNodeName('B'),
			isU: makePredByNodeName('U'),
			isS: makePredByNodeName('S'),
			isI: makePredByNodeName('I'),
			isImg: makePredByNodeName('IMG'),
			isTextarea: isTextarea,
			isEmpty: isEmpty,
			isEmptyAnchor: func.and(isAnchor, isEmpty),
			isClosestSibling: isClosestSibling,
			withClosestSiblings: withClosestSiblings,
			nodeLength: nodeLength,
			isLeftEdgePoint: isLeftEdgePoint,
			isRightEdgePoint: isRightEdgePoint,
			isEdgePoint: isEdgePoint,
			isLeftEdgeOf: isLeftEdgeOf,
			isRightEdgeOf: isRightEdgeOf,
			isLeftEdgePointOf: isLeftEdgePointOf,
			isRightEdgePointOf: isRightEdgePointOf,
			prevPoint: prevPoint,
			nextPoint: nextPoint,
			isSamePoint: isSamePoint,
			isVisiblePoint: isVisiblePoint,
			prevPointUntil: prevPointUntil,
			nextPointUntil: nextPointUntil,
			isCharPoint: isCharPoint,
			walkPoint: walkPoint,
			ancestor: ancestor,
			singleChildAncestor: singleChildAncestor,
			listAncestor: listAncestor,
			lastAncestor: lastAncestor,
			listNext: listNext,
			listPrev: listPrev,
			listDescendant: listDescendant,
			commonAncestor: commonAncestor,
			wrap: wrap,
			insertAfter: insertAfter,
			appendChildNodes: appendChildNodes,
			position: position,
			hasChildren: hasChildren,
			makeOffsetPath: makeOffsetPath,
			fromOffsetPath: fromOffsetPath,
			splitTree: splitTree,
			splitPoint: splitPoint,
			create: create,
			createText: createText,
			remove: remove,
			removeWhile: removeWhile,
			replace: replace,
			html: html,
			value: value,
			posFromPlaceholder: posFromPlaceholder,
			attachEvents: attachEvents,
			detachEvents: detachEvents
		};
	})();


	/**
	 * @param {jQuery} $note
	 * @param {Object} options
	 * @return {Context}
	 */
	var Context = function($note, options) {
		var self = this;

		var ui = $.summernote.ui;
		this.memos = {};
		this.modules = {};
		this.layoutInfo = {};
		this.options = options;

		/**
		 * create layout and initialize modules and other resources
		 */
		this.initialize = function() {
			this.layoutInfo = ui.createLayout($note, options);
			this._initialize();
			$note.hide();
			return this;
		};

		/**
		 * destroy modules and other resources and remove layout
		 */
		this.destroy = function() {
			this._destroy();
			$note.removeData('summernote');
			ui.removeLayout($note, this.layoutInfo);
		};

		/**
		 * destory modules and other resources and initialize it again
		 */
		this.reset = function() {
			this.code(dom.emptyPara);
			this._destroy();
			this._initialize();
		};

		this._initialize = function() {
			// add optional buttons
			var buttons = $.extend({}, this.options.buttons);
			Object.keys(buttons).forEach(function(key) {
				self.memo('button.' + key, buttons[key]);
			});

			var modules = $.extend({}, this.options.modules, $.summernote.plugins || {});

			// add and initialize modules
			Object.keys(modules).forEach(function(key) {
				self.module(key, modules[key], true);
			});

			Object.keys(this.modules).forEach(function(key) {
				self.initializeModule(key);
			});
		};

		this._destroy = function() {
			// destroy modules with reversed order
			Object.keys(this.modules).reverse().forEach(function(key) {
				self.removeModule(key);
			});

			Object.keys(this.memos).forEach(function(key) {
				self.removeMemo(key);
			});
		};

		this.code = function(html) {
			var isActivated = this.invoke('codeview.isActivated');

			if (html === undefined) {
				this.invoke('codeview.sync');
				return isActivated ? this.layoutInfo.codable.val() : this.layoutInfo.editable.html();
			} else {
				if (isActivated) {
					this.layoutInfo.codable.val(html);
				} else {
					this.layoutInfo.editable.html(html);
				}
				$note.val(html);
				this.triggerEvent('change', html);
			}
		};

		this.isDisabled = function() {
			return this.layoutInfo.editable.attr('contenteditable') === 'false';
		};

		this.enable = function() {
			this.layoutInfo.editable.attr('contenteditable', true);
			this.invoke('toolbar.activate', true);
		};

		this.disable = function() {
			// close codeview if codeview is opend
			if (this.invoke('codeview.isActivated')) {
				this.invoke('codeview.deactivate');
			}
			this.layoutInfo.editable.attr('contenteditable', false);
			this.invoke('toolbar.deactivate', true);
		};

		this.triggerEvent = function() {
			var namespace = list.head(arguments);
			var args = list.tail(list.from(arguments));

			var callback = this.options.callbacks[func.namespaceToCamel(namespace, 'on')];
			if (callback) {
				callback.apply($note[0], args);
			}
			$note.trigger('summernote.' + namespace, args);
		};

		this.initializeModule = function(key) {
			var module = this.modules[key];
			module.shouldInitialize = module.shouldInitialize || func.ok;
			if (!module.shouldInitialize()) {
				return;
			}

			// initialize module
			if (module.initialize) {
				module.initialize();
			}

			// attach events
			if (module.events) {
				dom.attachEvents($note, module.events);
			}
		};

		this.module = function(key, ModuleClass, withoutIntialize) {
			if (arguments.length === 1) {
				return this.modules[key];
			}

			this.modules[key] = new ModuleClass(this);

			if (!withoutIntialize) {
				this.initializeModule(key);
			}
		};

		this.removeModule = function(key) {
			var module = this.modules[key];
			if (module.shouldInitialize()) {
				if (module.events) {
					dom.detachEvents($note, module.events);
				}

				if (module.destroy) {
					module.destroy();
				}
			}

			delete this.modules[key];
		};

		this.memo = function(key, obj) {
			if (arguments.length === 1) {
				return this.memos[key];
			}
			this.memos[key] = obj;
		};

		this.removeMemo = function(key) {
			if (this.memos[key] && this.memos[key].destroy) {
				this.memos[key].destroy();
			}

			delete this.memos[key];
		};

		this.createInvokeHandler = function(namespace, value) {
			return function(event) {
				event.preventDefault();
				self.invoke(namespace, value || $(event.target).closest('[data-value]').data('value'));
			};
		};

		this.invoke = function() {
			var namespace = list.head(arguments);
			var args = list.tail(list.from(arguments));

			var splits = namespace.split('.');
			var hasSeparator = splits.length > 1;
			var moduleName = hasSeparator && list.head(splits);
			var methodName = hasSeparator ? list.last(splits) : list.head(splits);

			var module = this.modules[moduleName || 'editor'];
			if (!moduleName && this[methodName]) {
				return this[methodName].apply(this, args);
			} else if (module && module[methodName] && module.shouldInitialize()) {
				return module[methodName].apply(module, args);
			}
		};

		return this.initialize();
	};

	$.summernote = $.summernote || {
		lang: {}
	};

	$.fn.extend({
		/**
		 * Summernote API
		 *
		 * @param {Object|String}
		 * @return {this}
		 */
		summernote: function() {
			var type = $.type(list.head(arguments));
			var isExternalAPICalled = type === 'string';
			var hasInitOptions = type === 'object';

			var options = hasInitOptions ? list.head(arguments) : {};

			options = $.extend({}, $.summernote.options, options);
			options.langInfo = $.extend(true, {}, $.summernote.lang['en-US'], $.summernote.lang[options.lang]);

			this.each(function(idx, note) {
				var $note = $(note);
				if (!$note.data('summernote')) {
					var context = new Context($note, options);
					$note.data('summernote', context);
					$note.data('summernote').triggerEvent('init', context.layoutInfo);
				}
			});

			var $note = this.first();
			if ($note.length) {
				var context = $note.data('summernote');
				if (isExternalAPICalled) {
					return context.invoke.apply(context, list.from(arguments));
				} else if (options.focus) {
					context.invoke('editor.focus');
				}
			}

			return this;
		}
	});


	var Renderer = function(markup, children, options, callback) {
		this.render = function($parent) {
			var $node = $(markup);

			if (options && options.contents) {
				$node.html(options.contents);
			}

			if (options && options.className) {
				$node.addClass(options.className);
			}

			if (options && options.data) {
				$.each(options.data, function(k, v) {
					$node.attr('data-' + k, v);
				});
			}

			if (options && options.click) {
				$node.on('click', options.click);
			}

			if (children) {
				var $container = $node.find('.note-children-container');
				children.forEach(function(child) {
					child.render($container.length ? $container : $node);
				});
			}

			if (callback) {
				callback($node, options);
			}

			if (options && options.callback) {
				options.callback($node);
			}

			if ($parent) {
				$parent.append($node);
			}

			return $node;
		};
	};

	var renderer = {
		create: function(markup, callback) {
			return function() {
				var children = $.isArray(arguments[0]) ? arguments[0] : [];
				var options = typeof arguments[1] === 'object' ? arguments[1] : arguments[0];
				if (options && options.children) {
					children = options.children;
				}
				return new Renderer(markup, children, options, callback);
			};
		}
	};

	var editor = renderer.create('<div class="note-editor note-frame panel panel-default"/>');
	var toolbar = renderer.create('<div class="note-toolbar panel-heading"/>');
	var editingArea = renderer.create('<div class="note-editing-area"/>');
	var codable = renderer.create('<textarea class="note-codable"/>');
	var editable = renderer.create('<div class="note-editable panel-body" contentEditable="true"/>');
	var statusbar = renderer.create([
		'<div class="note-statusbar">',
		'  <div class="note-resizebar">',
		'    <div class="note-icon-bar"/>',
		'    <div class="note-icon-bar"/>',
		'    <div class="note-icon-bar"/>',
		'  </div>',
		'</div>'
	].join(''));

	var airEditor = renderer.create('<div class="note-editor"/>');
	var airEditable = renderer.create('<div class="note-editable" contentEditable="true"/>');

	var buttonGroup = renderer.create('<div class="note-btn-group btn-group">');
	var button = renderer.create('<button type="button" class="note-btn btn btn-default btn-sm">', function($node, options) {
		if (options && options.tooltip) {
			$node.attr({
				title: options.tooltip
			}).tooltip({
				container: 'body',
				trigger: 'hover',
				placement: 'bottom'
			});
		}
	});

	var dropdown = renderer.create('<div class="dropdown-menu">', function($node, options) {
		var markup = $.isArray(options.items) ? options.items.map(function(item) {
			var value = (typeof item === 'string') ? item : (item.value || '');
			var content = options.template ? options.template(item) : item;
			return '<li><a href="#" data-value="' + value + '">' + content + '</a></li>';
		}).join('') : options.items;

		$node.html(markup);
	});

	var dropdownCheck = renderer.create('<div class="dropdown-menu note-check">', function($node, options) {
		var markup = $.isArray(options.items) ? options.items.map(function(item) {
			var value = (typeof item === 'string') ? item : (item.value || '');
			var content = options.template ? options.template(item) : item;
			return '<li><a href="#" data-value="' + value + '">' + icon(options.checkClassName) + ' ' + content + '</a></li>';
		}).join('') : options.items;
		$node.html(markup);
	});

	var palette = renderer.create('<div class="note-color-palette"/>', function($node, options) {
		var contents = [];
		for (var row = 0, rowSize = options.colors.length; row < rowSize; row++) {
			var eventName = options.eventName;
			var colors = options.colors[row];
			var buttons = [];
			for (var col = 0, colSize = colors.length; col < colSize; col++) {
				var color = colors[col];
				buttons.push([
					'<button type="button" class="note-color-btn"',
					'style="background-color:', color, '" ',
					'data-event="', eventName, '" ',
					'data-value="', color, '" ',
					'title="', color, '" ',
					'data-toggle="button" tabindex="-1"></button>'
				].join(''));
			}
			contents.push('<div class="note-color-row">' + buttons.join('') + '</div>');
		}
		$node.html(contents.join(''));

		$node.find('.note-color-btn').tooltip({
			container: 'body',
			trigger: 'hover',
			placement: 'bottom'
		});
	});

	var dialog = renderer.create('<div class="modal" aria-hidden="false" tabindex="-1"/>', function($node, options) {
		if (options.fade) {
			$node.addClass('fade');
		}
		$node.html([
			'<div class="modal-dialog">',
			'  <div class="modal-content">', (options.title ?
				'    <div class="modal-header">' +
				'      <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>' +
				'      <h4 class="modal-title">' + options.title + '</h4>' +
				'    </div>' : ''
			),
			'    <div class="modal-body">' + options.body + '</div>', (options.footer ?
				'    <div class="modal-footer">' + options.footer + '</div>' : ''
			),
			'  </div>',
			'</div>'
		].join(''));
	});

	var popover = renderer.create([
		'<div class="note-popover popover in">',
		'  <div class="arrow"/>',
		'  <div class="popover-content note-children-container"/>',
		'</div>'
	].join(''), function($node, options) {
		var direction = typeof options.direction !== 'undefined' ? options.direction : 'bottom';

		$node.addClass(direction);

		if (options.hideArrow) {
			$node.find('.arrow').hide();
		}
	});

	var icon = function(iconClassName, tagName) {
		tagName = tagName || 'i';
		return '<' + tagName + ' class="' + iconClassName + '"/>';
	};

	var ui = {
		editor: editor,
		toolbar: toolbar,
		editingArea: editingArea,
		codable: codable,
		editable: editable,
		statusbar: statusbar,
		airEditor: airEditor,
		airEditable: airEditable,
		buttonGroup: buttonGroup,
		button: button,
		dropdown: dropdown,
		dropdownCheck: dropdownCheck,
		palette: palette,
		dialog: dialog,
		popover: popover,
		icon: icon,

		toggleBtn: function($btn, isEnable) {
			$btn.toggleClass('disabled', !isEnable);
			$btn.attr('disabled', !isEnable);
		},

		toggleBtnActive: function($btn, isActive) {
			$btn.toggleClass('active', isActive);
		},

		onDialogShown: function($dialog, handler) {
			$dialog.one('shown.bs.modal', handler);
		},

		onDialogHidden: function($dialog, handler) {
			$dialog.one('hidden.bs.modal', handler);
		},

		showDialog: function($dialog) {
			$dialog.modal('show');
		},

		hideDialog: function($dialog) {
			$dialog.modal('hide');
		},

		createLayout: function($note, options) {
			var $editor = (options.airMode ? ui.airEditor([
				ui.editingArea([
					ui.airEditable()
				])
			]) : ui.editor([
				ui.toolbar(),
				ui.editingArea([
					ui.codable(),
					ui.editable()
				]),
				ui.statusbar()
			])).render();

			$editor.insertAfter($note);

			return {
				note: $note,
				editor: $editor,
				toolbar: $editor.find('.note-toolbar'),
				editingArea: $editor.find('.note-editing-area'),
				editable: $editor.find('.note-editable'),
				codable: $editor.find('.note-codable'),
				statusbar: $editor.find('.note-statusbar')
			};
		},

		removeLayout: function($note, layoutInfo) {
			$note.html(layoutInfo.editable.html());
			layoutInfo.editor.remove();
			$note.show();
		}
	};

	$.extend($.summernote.lang, {
		'en-US': {
			font: {
				bold: 'Bold',
				italic: 'Italic',
				underline: 'Underline',
				clear: 'Remove Font Style',
				height: 'Line Height',
				name: 'Font Family',
				strikethrough: 'Strikethrough',
				subscript: 'Subscript',
				superscript: 'Superscript',
				size: 'Font Size'
			},
			image: {
				image: 'Picture',
				insert: 'Insert Image',
				resizeFull: 'Resize Full',
				resizeHalf: 'Resize Half',
				resizeQuarter: 'Resize Quarter',
				floatLeft: 'Float Left',
				floatRight: 'Float Right',
				floatNone: 'Float None',
				shapeRounded: 'Shape: Rounded',
				shapeCircle: 'Shape: Circle',
				shapeThumbnail: 'Shape: Thumbnail',
				shapeNone: 'Shape: None',
				dragImageHere: 'Drag image or text here',
				dropImage: 'Drop image or Text',
				selectFromFiles: 'Select from files',
				maximumFileSize: 'Maximum file size',
				maximumFileSizeError: 'Maximum file size exceeded.',
				url: 'Image URL',
				remove: 'Remove Image'
			},
			video: {
				video: 'Video',
				videoLink: 'Video Link',
				insert: 'Insert Video',
				url: 'Video URL?',
				providers: '(YouTube, Vimeo, Vine, Instagram, DailyMotion or Youku)'
			},
			link: {
				link: 'Link',
				insert: 'Insert Link',
				unlink: 'Unlink',
				edit: 'Edit',
				textToDisplay: 'Text to display',
				url: 'To what URL should this link go?',
				openInNewWindow: 'Open in new window'
			},
			table: {
				table: 'Table'
			},
			hr: {
				insert: 'Insert Horizontal Rule'
			},
			style: {
				style: 'Style',
				normal: 'Normal',
				blockquote: 'Quote',
				pre: 'Code',
				h1: 'Header 1',
				h2: 'Header 2',
				h3: 'Header 3',
				h4: 'Header 4',
				h5: 'Header 5',
				h6: 'Header 6'
			},
			lists: {
				unordered: 'Unordered list',
				ordered: 'Ordered list'
			},
			options: {
				help: 'Help',
				fullscreen: 'Full Screen',
				codeview: 'Code View'
			},
			paragraph: {
				paragraph: 'Paragraph',
				outdent: 'Outdent',
				indent: 'Indent',
				left: 'Align left',
				center: 'Align center',
				right: 'Align right',
				justify: 'Justify full'
			},
			color: {
				recent: 'Recent Color',
				more: 'More Color',
				background: 'Background Color',
				foreground: 'Foreground Color',
				transparent: 'Transparent',
				setTransparent: 'Set transparent',
				reset: 'Reset',
				resetToDefault: 'Reset to default'
			},
			shortcut: {
				shortcuts: 'Keyboard shortcuts',
				close: 'Close',
				textFormatting: 'Text formatting',
				action: 'Action',
				paragraphFormatting: 'Paragraph formatting',
				documentStyle: 'Document Style',
				extraKeys: 'Extra keys'
			},
			help: {
				'insertParagraph': 'Insert Paragraph',
				'undo': 'Undoes the last command',
				'redo': 'Redoes the last command',
				'tab': 'Tab',
				'untab': 'Untab',
				'bold': 'Set a bold style',
				'italic': 'Set a italic style',
				'underline': 'Set a underline style',
				'strikethrough': 'Set a strikethrough style',
				'removeFormat': 'Clean a style',
				'justifyLeft': 'Set left align',
				'justifyCenter': 'Set center align',
				'justifyRight': 'Set right align',
				'justifyFull': 'Set full align',
				'insertUnorderedList': 'Toggle unordered list',
				'insertOrderedList': 'Toggle ordered list',
				'outdent': 'Outdent on current paragraph',
				'indent': 'Indent on current paragraph',
				'formatPara': 'Change current block\'s format as a paragraph(P tag)',
				'formatH1': 'Change current block\'s format as H1',
				'formatH2': 'Change current block\'s format as H2',
				'formatH3': 'Change current block\'s format as H3',
				'formatH4': 'Change current block\'s format as H4',
				'formatH5': 'Change current block\'s format as H5',
				'formatH6': 'Change current block\'s format as H6',
				'insertHorizontalRule': 'Insert horizontal rule',
				'linkDialog.show': 'Show Link Dialog'
			},
			history: {
				undo: 'Undo',
				redo: 'Redo'
			},
			specialChar: {
				specialChar: 'SPECIAL CHARACTERS',
				select: 'Select Special characters'
			}
		}
	});


	/**
	 * @class core.key
	 *
	 * Object for keycodes.
	 *
	 * @singleton
	 * @alternateClassName key
	 */
	var key = (function() {
		var keyMap = {
			'BACKSPACE': 8,
			'TAB': 9,
			'ENTER': 13,
			'SPACE': 32,

			// Arrow
			'LEFT': 37,
			'UP': 38,
			'RIGHT': 39,
			'DOWN': 40,

			// Number: 0-9
			'NUM0': 48,
			'NUM1': 49,
			'NUM2': 50,
			'NUM3': 51,
			'NUM4': 52,
			'NUM5': 53,
			'NUM6': 54,
			'NUM7': 55,
			'NUM8': 56,

			// Alphabet: a-z
			'B': 66,
			'E': 69,
			'I': 73,
			'J': 74,
			'K': 75,
			'L': 76,
			'R': 82,
			'S': 83,
			'U': 85,
			'V': 86,
			'Y': 89,
			'Z': 90,

			'SLASH': 191,
			'LEFTBRACKET': 219,
			'BACKSLASH': 220,
			'RIGHTBRACKET': 221
		};

		return {
			/**
			 * @method isEdit
			 *
			 * @param {Number} keyCode
			 * @return {Boolean}
			 */
			isEdit: function(keyCode) {
				return list.contains([
					keyMap.BACKSPACE,
					keyMap.TAB,
					keyMap.ENTER,
					keyMap.SPACe
				], keyCode);
			},
			/**
			 * @method isMove
			 *
			 * @param {Number} keyCode
			 * @return {Boolean}
			 */
			isMove: function(keyCode) {
				return list.contains([
					keyMap.LEFT,
					keyMap.UP,
					keyMap.RIGHT,
					keyMap.DOWN
				], keyCode);
			},
			/**
			 * @property {Object} nameFromCode
			 * @property {String} nameFromCode.8 "BACKSPACE"
			 */
			nameFromCode: func.invertObject(keyMap),
			code: keyMap
		};
	})();


	var range = (function() {

		/**
		 * return boundaryPoint from TextRange, inspired by Andy Na's HuskyRange.js
		 *
		 * @param {TextRange} textRange
		 * @param {Boolean} isStart
		 * @return {BoundaryPoint}
		 *
		 * @see http://msdn.microsoft.com/en-us/library/ie/ms535872(v=vs.85).aspx
		 */
		var textRangeToPoint = function(textRange, isStart) {
			var container = textRange.parentElement(),
				offset;

			var tester = document.body.createTextRange(),
				prevContainer;
			var childNodes = list.from(container.childNodes);
			for (offset = 0; offset < childNodes.length; offset++) {
				if (dom.isText(childNodes[offset])) {
					continue;
				}
				tester.moveToElementText(childNodes[offset]);
				if (tester.compareEndPoints('StartToStart', textRange) >= 0) {
					break;
				}
				prevContainer = childNodes[offset];
			}

			if (offset !== 0 && dom.isText(childNodes[offset - 1])) {
				var textRangeStart = document.body.createTextRange(),
					curTextNode = null;
				textRangeStart.moveToElementText(prevContainer || container);
				textRangeStart.collapse(!prevContainer);
				curTextNode = prevContainer ? prevContainer.nextSibling : container.firstChild;

				var pointTester = textRange.duplicate();
				pointTester.setEndPoint('StartToStart', textRangeStart);
				var textCount = pointTester.text.replace(/[\r\n]/g, '').length;

				while (textCount > curTextNode.nodeValue.length && curTextNode.nextSibling) {
					textCount -= curTextNode.nodeValue.length;
					curTextNode = curTextNode.nextSibling;
				}

				/* jshint ignore:start */
				var dummy = curTextNode.nodeValue; // enforce IE to re-reference curTextNode, hack
				/* jshint ignore:end */

				if (isStart && curTextNode.nextSibling && dom.isText(curTextNode.nextSibling) &&
					textCount === curTextNode.nodeValue.length) {
					textCount -= curTextNode.nodeValue.length;
					curTextNode = curTextNode.nextSibling;
				}

				container = curTextNode;
				offset = textCount;
			}

			return {
				cont: container,
				offset: offset
			};
		};

		/**
		 * return TextRange from boundary point (inspired by google closure-library)
		 * @param {BoundaryPoint} point
		 * @return {TextRange}
		 */
		var pointToTextRange = function(point) {
			var textRangeInfo = function(container, offset) {
				var node, isCollapseToStart;

				if (dom.isText(container)) {
					var prevTextNodes = dom.listPrev(container, func.not(dom.isText));
					var prevContainer = list.last(prevTextNodes).previousSibling;
					node = prevContainer || container.parentNode;
					offset += list.sum(list.tail(prevTextNodes), dom.nodeLength);
					isCollapseToStart = !prevContainer;
				} else {
					node = container.childNodes[offset] || container;
					if (dom.isText(node)) {
						return textRangeInfo(node, 0);
					}

					offset = 0;
					isCollapseToStart = false;
				}

				return {
					node: node,
					collapseToStart: isCollapseToStart,
					offset: offset
				};
			};

			var textRange = document.body.createTextRange();
			var info = textRangeInfo(point.node, point.offset);

			textRange.moveToElementText(info.node);
			textRange.collapse(info.collapseToStart);
			textRange.moveStart('character', info.offset);
			return textRange;
		};

		/**
		 * Wrapped Range
		 *
		 * @constructor
		 * @param {Node} sc - start container
		 * @param {Number} so - start offset
		 * @param {Node} ec - end container
		 * @param {Number} eo - end offset
		 */
		var WrappedRange = function(sc, so, ec, eo) {
			this.sc = sc;
			this.so = so;
			this.ec = ec;
			this.eo = eo;

			// nativeRange: get nativeRange from sc, so, ec, eo
			var nativeRange = function() {
				if (agent.isW3CRangeSupport) {
					var w3cRange = document.createRange();
					w3cRange.setStart(sc, so);
					w3cRange.setEnd(ec, eo);

					return w3cRange;
				} else {
					var textRange = pointToTextRange({
						node: sc,
						offset: so
					});

					textRange.setEndPoint('EndToEnd', pointToTextRange({
						node: ec,
						offset: eo
					}));

					return textRange;
				}
			};

			this.getPoints = function() {
				return {
					sc: sc,
					so: so,
					ec: ec,
					eo: eo
				};
			};

			this.getStartPoint = function() {
				return {
					node: sc,
					offset: so
				};
			};

			this.getEndPoint = function() {
				return {
					node: ec,
					offset: eo
				};
			};

			/**
			 * select update visible range
			 */
			this.select = function() {
				var nativeRng = nativeRange();
				if (agent.isW3CRangeSupport) {
					var selection = document.getSelection();
					if (selection.rangeCount > 0) {
						selection.removeAllRanges();
					}
					selection.addRange(nativeRng);
				} else {
					nativeRng.select();
				}

				return this;
			};


			/**
			 * Moves the scrollbar to start container(sc) of current range
			 *
			 * @return {WrappedRange}
			 */
			this.scrollIntoView = function($container) {
				if ($container[0].scrollTop + $container.height() < this.sc.offsetTop) {
					$container[0].scrollTop += Math.abs($container[0].scrollTop + $container.height() - this.sc.offsetTop);
				}

				return this;
			};

			/**
			 * @return {WrappedRange}
			 */
			this.normalize = function() {

				/**
				 * @param {BoundaryPoint} point
				 * @param {Boolean} isLeftToRight
				 * @return {BoundaryPoint}
				 */
				var getVisiblePoint = function(point, isLeftToRight) {
					if ((dom.isVisiblePoint(point) && !dom.isEdgePoint(point)) ||
						(dom.isVisiblePoint(point) && dom.isRightEdgePoint(point) && !isLeftToRight) ||
						(dom.isVisiblePoint(point) && dom.isLeftEdgePoint(point) && isLeftToRight) ||
						(dom.isVisiblePoint(point) && dom.isBlock(point.node) && dom.isEmpty(point.node))) {
						return point;
					}

					// point on block's edge
					var block = dom.ancestor(point.node, dom.isBlock);
					if (((dom.isLeftEdgePointOf(point, block) || dom.isVoid(dom.prevPoint(point).node)) && !isLeftToRight) ||
						((dom.isRightEdgePointOf(point, block) || dom.isVoid(dom.nextPoint(point).node)) && isLeftToRight)) {

						// returns point already on visible point
						if (dom.isVisiblePoint(point)) {
							return point;
						}
						// reverse direction 
						isLeftToRight = !isLeftToRight;
					}

					var nextPoint = isLeftToRight ? dom.nextPointUntil(dom.nextPoint(point), dom.isVisiblePoint) :
						dom.prevPointUntil(dom.prevPoint(point), dom.isVisiblePoint);
					return nextPoint || point;
				};

				var endPoint = getVisiblePoint(this.getEndPoint(), false);
				var startPoint = this.isCollapsed() ? endPoint : getVisiblePoint(this.getStartPoint(), true);

				return new WrappedRange(
					startPoint.node,
					startPoint.offset,
					endPoint.node,
					endPoint.offset
				);
			};

			/**
			 * returns matched nodes on range
			 *
			 * @param {Function} [pred] - predicate function
			 * @param {Object} [options]
			 * @param {Boolean} [options.includeAncestor]
			 * @param {Boolean} [options.fullyContains]
			 * @return {Node[]}
			 */
			this.nodes = function(pred, options) {
				pred = pred || func.ok;

				var includeAncestor = options && options.includeAncestor;
				var fullyContains = options && options.fullyContains;

				// TODO compare points and sort
				var startPoint = this.getStartPoint();
				var endPoint = this.getEndPoint();

				var nodes = [];
				var leftEdgeNodes = [];

				dom.walkPoint(startPoint, endPoint, function(point) {
					if (dom.isEditable(point.node)) {
						return;
					}

					var node;
					if (fullyContains) {
						if (dom.isLeftEdgePoint(point)) {
							leftEdgeNodes.push(point.node);
						}
						if (dom.isRightEdgePoint(point) && list.contains(leftEdgeNodes, point.node)) {
							node = point.node;
						}
					} else if (includeAncestor) {
						node = dom.ancestor(point.node, pred);
					} else {
						node = point.node;
					}

					if (node && pred(node)) {
						nodes.push(node);
					}
				}, true);

				return list.unique(nodes);
			};

			/**
			 * returns commonAncestor of range
			 * @return {Element} - commonAncestor
			 */
			this.commonAncestor = function() {
				return dom.commonAncestor(sc, ec);
			};

			/**
			 * returns expanded range by pred
			 *
			 * @param {Function} pred - predicate function
			 * @return {WrappedRange}
			 */
			this.expand = function(pred) {
				var startAncestor = dom.ancestor(sc, pred);
				var endAncestor = dom.ancestor(ec, pred);

				if (!startAncestor && !endAncestor) {
					return new WrappedRange(sc, so, ec, eo);
				}

				var boundaryPoints = this.getPoints();

				if (startAncestor) {
					boundaryPoints.sc = startAncestor;
					boundaryPoints.so = 0;
				}

				if (endAncestor) {
					boundaryPoints.ec = endAncestor;
					boundaryPoints.eo = dom.nodeLength(endAncestor);
				}

				return new WrappedRange(
					boundaryPoints.sc,
					boundaryPoints.so,
					boundaryPoints.ec,
					boundaryPoints.eo
				);
			};

			/**
			 * @param {Boolean} isCollapseToStart
			 * @return {WrappedRange}
			 */
			this.collapse = function(isCollapseToStart) {
				if (isCollapseToStart) {
					return new WrappedRange(sc, so, sc, so);
				} else {
					return new WrappedRange(ec, eo, ec, eo);
				}
			};

			/**
			 * splitText on range
			 */
			this.splitText = function() {
				var isSameContainer = sc === ec;
				var boundaryPoints = this.getPoints();

				if (dom.isText(ec) && !dom.isEdgePoint(this.getEndPoint())) {
					ec.splitText(eo);
				}

				if (dom.isText(sc) && !dom.isEdgePoint(this.getStartPoint())) {
					boundaryPoints.sc = sc.splitText(so);
					boundaryPoints.so = 0;

					if (isSameContainer) {
						boundaryPoints.ec = boundaryPoints.sc;
						boundaryPoints.eo = eo - so;
					}
				}

				return new WrappedRange(
					boundaryPoints.sc,
					boundaryPoints.so,
					boundaryPoints.ec,
					boundaryPoints.eo
				);
			};

			/**
			 * delete contents on range
			 * @return {WrappedRange}
			 */
			this.deleteContents = function() {
				if (this.isCollapsed()) {
					return this;
				}

				var rng = this.splitText();
				var nodes = rng.nodes(null, {
					fullyContains: true
				});

				// find new cursor point
				var point = dom.prevPointUntil(rng.getStartPoint(), function(point) {
					return !list.contains(nodes, point.node);
				});

				var emptyParents = [];
				$.each(nodes, function(idx, node) {
					// find empty parents
					var parent = node.parentNode;
					if (point.node !== parent && dom.nodeLength(parent) === 1) {
						emptyParents.push(parent);
					}
					dom.remove(node, false);
				});

				// remove empty parents
				$.each(emptyParents, function(idx, node) {
					dom.remove(node, false);
				});

				return new WrappedRange(
					point.node,
					point.offset,
					point.node,
					point.offset
				).normalize();
			};

			/**
			 * makeIsOn: return isOn(pred) function
			 */
			var makeIsOn = function(pred) {
				return function() {
					var ancestor = dom.ancestor(sc, pred);
					return !!ancestor && (ancestor === dom.ancestor(ec, pred));
				};
			};

			// isOnEditable: judge whether range is on editable or not
			this.isOnEditable = makeIsOn(dom.isEditable);
			// isOnList: judge whether range is on list node or not
			this.isOnList = makeIsOn(dom.isList);
			// isOnAnchor: judge whether range is on anchor node or not
			this.isOnAnchor = makeIsOn(dom.isAnchor);
			// isOnAnchor: judge whether range is on cell node or not
			this.isOnCell = makeIsOn(dom.isCell);

			/**
			 * @param {Function} pred
			 * @return {Boolean}
			 */
			this.isLeftEdgeOf = function(pred) {
				if (!dom.isLeftEdgePoint(this.getStartPoint())) {
					return false;
				}

				var node = dom.ancestor(this.sc, pred);
				return node && dom.isLeftEdgeOf(this.sc, node);
			};

			/**
			 * returns whether range was collapsed or not
			 */
			this.isCollapsed = function() {
				return sc === ec && so === eo;
			};

			/**
			 * wrap inline nodes which children of body with paragraph
			 *
			 * @return {WrappedRange}
			 */
			this.wrapBodyInlineWithPara = function() {
				if (dom.isBodyContainer(sc) && dom.isEmpty(sc)) {
					sc.innerHTML = dom.emptyPara;
					return new WrappedRange(sc.firstChild, 0, sc.firstChild, 0);
				}

				/**
				 * [workaround] firefox often create range on not visible point. so normalize here.
				 *  - firefox: |<p>text</p>|
				 *  - chrome: <p>|text|</p>
				 */
				var rng = this.normalize();
				if (dom.isParaInline(sc) || dom.isPara(sc)) {
					return rng;
				}

				// find inline top ancestor
				var topAncestor;
				if (dom.isInline(rng.sc)) {
					var ancestors = dom.listAncestor(rng.sc, func.not(dom.isInline));
					topAncestor = list.last(ancestors);
					if (!dom.isInline(topAncestor)) {
						topAncestor = ancestors[ancestors.length - 2] || rng.sc.childNodes[rng.so];
					}
				} else {
					topAncestor = rng.sc.childNodes[rng.so > 0 ? rng.so - 1 : 0];
				}

				// siblings not in paragraph
				var inlineSiblings = dom.listPrev(topAncestor, dom.isParaInline).reverse();
				inlineSiblings = inlineSiblings.concat(dom.listNext(topAncestor.nextSibling, dom.isParaInline));

				// wrap with paragraph
				if (inlineSiblings.length) {
					var para = dom.wrap(list.head(inlineSiblings), 'p');
					dom.appendChildNodes(para, list.tail(inlineSiblings));
				}

				return this.normalize();
			};

			/**
			 * insert node at current cursor
			 *
			 * @param {Node} node
			 * @return {Node}
			 */
			this.insertNode = function(node) {
				var rng = this.wrapBodyInlineWithPara().deleteContents();
				var info = dom.splitPoint(rng.getStartPoint(), dom.isInline(node));

				if (info.rightNode) {
					info.rightNode.parentNode.insertBefore(node, info.rightNode);
				} else {
					info.container.appendChild(node);
				}

				return node;
			};

			/**
			 * insert html at current cursor
			 */
			this.pasteHTML = function(markup) {
				var contentsContainer = $('<div></div>').html(markup)[0];
				var childNodes = list.from(contentsContainer.childNodes);

				var rng = this.wrapBodyInlineWithPara().deleteContents();

				return childNodes.reverse().map(function(childNode) {
					return rng.insertNode(childNode);
				}).reverse();
			};

			/**
			 * returns text in range
			 *
			 * @return {String}
			 */
			this.toString = function() {
				var nativeRng = nativeRange();
				return agent.isW3CRangeSupport ? nativeRng.toString() : nativeRng.text;
			};

			/**
			 * returns range for word before cursor
			 *
			 * @param {Boolean} [findAfter] - find after cursor, default: false
			 * @return {WrappedRange}
			 */
			this.getWordRange = function(findAfter) {
				var endPoint = this.getEndPoint();

				if (!dom.isCharPoint(endPoint)) {
					return this;
				}

				var startPoint = dom.prevPointUntil(endPoint, function(point) {
					return !dom.isCharPoint(point);
				});

				if (findAfter) {
					endPoint = dom.nextPointUntil(endPoint, function(point) {
						return !dom.isCharPoint(point);
					});
				}

				return new WrappedRange(
					startPoint.node,
					startPoint.offset,
					endPoint.node,
					endPoint.offset
				);
			};

			/**
			 * create offsetPath bookmark
			 *
			 * @param {Node} editable
			 */
			this.bookmark = function(editable) {
				return {
					s: {
						path: dom.makeOffsetPath(editable, sc),
						offset: so
					},
					e: {
						path: dom.makeOffsetPath(editable, ec),
						offset: eo
					}
				};
			};

			/**
			 * create offsetPath bookmark base on paragraph
			 *
			 * @param {Node[]} paras
			 */
			this.paraBookmark = function(paras) {
				return {
					s: {
						path: list.tail(dom.makeOffsetPath(list.head(paras), sc)),
						offset: so
					},
					e: {
						path: list.tail(dom.makeOffsetPath(list.last(paras), ec)),
						offset: eo
					}
				};
			};

			/**
			 * getClientRects
			 * @return {Rect[]}
			 */
			this.getClientRects = function() {
				var nativeRng = nativeRange();
				return nativeRng.getClientRects();
			};
		};

		/**
		 * @class core.range
		 *
		 * Data structure
		 *  * BoundaryPoint: a point of dom tree
		 *  * BoundaryPoints: two boundaryPoints corresponding to the start and the end of the Range
		 *
		 * See to http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html#Level-2-Range-Position
		 *
		 * @singleton
		 * @alternateClassName range
		 */
		return {
			/**
			 * @method
			 *
			 * create Range Object From arguments or Browser Selection
			 *
			 * @param {Node} sc - start container
			 * @param {Number} so - start offset
			 * @param {Node} ec - end container
			 * @param {Number} eo - end offset
			 * @return {WrappedRange}
			 */
			create: function(sc, so, ec, eo) {
				if (!arguments.length) { // from Browser Selection
					if (agent.isW3CRangeSupport) {
						var selection = document.getSelection();
						if (!selection || selection.rangeCount === 0) {
							return null;
						} else if (dom.isBody(selection.anchorNode)) {
							// Firefox: returns entire body as range on initialization. We won't never need it.
							return null;
						}

						var nativeRng = selection.getRangeAt(0);
						sc = nativeRng.startContainer;
						so = nativeRng.startOffset;
						ec = nativeRng.endContainer;
						eo = nativeRng.endOffset;
					} else { // IE8: TextRange
						var textRange = document.selection.createRange();
						var textRangeEnd = textRange.duplicate();
						textRangeEnd.collapse(false);
						var textRangeStart = textRange;
						textRangeStart.collapse(true);

						var startPoint = textRangeToPoint(textRangeStart, true),
							endPoint = textRangeToPoint(textRangeEnd, false);

						// same visible point case: range was collapsed.
						if (dom.isText(startPoint.node) && dom.isLeftEdgePoint(startPoint) &&
							dom.isTextNode(endPoint.node) && dom.isRightEdgePoint(endPoint) &&
							endPoint.node.nextSibling === startPoint.node) {
							startPoint = endPoint;
						}

						sc = startPoint.cont;
						so = startPoint.offset;
						ec = endPoint.cont;
						eo = endPoint.offset;
					}
				} else if (arguments.length === 2) { //collapsed
					ec = sc;
					eo = so;
				}
				return new WrappedRange(sc, so, ec, eo);
			},

			/**
			 * @method
			 *
			 * create WrappedRange from node
			 *
			 * @param {Node} node
			 * @return {WrappedRange}
			 */
			createFromNode: function(node) {
				var sc = node;
				var so = 0;
				var ec = node;
				var eo = dom.nodeLength(ec);

				// browsers can't target a picture or void node
				if (dom.isVoid(sc)) {
					so = dom.listPrev(sc).length - 1;
					sc = sc.parentNode;
				}
				if (dom.isBR(ec)) {
					eo = dom.listPrev(ec).length - 1;
					ec = ec.parentNode;
				} else if (dom.isVoid(ec)) {
					eo = dom.listPrev(ec).length;
					ec = ec.parentNode;
				}

				return this.create(sc, so, ec, eo);
			},

			/**
			 * create WrappedRange from node after position
			 *
			 * @param {Node} node
			 * @return {WrappedRange}
			 */
			createFromNodeBefore: function(node) {
				return this.createFromNode(node).collapse(true);
			},

			/**
			 * create WrappedRange from node after position
			 *
			 * @param {Node} node
			 * @return {WrappedRange}
			 */
			createFromNodeAfter: function(node) {
				return this.createFromNode(node).collapse();
			},

			/**
			 * @method
			 *
			 * create WrappedRange from bookmark
			 *
			 * @param {Node} editable
			 * @param {Object} bookmark
			 * @return {WrappedRange}
			 */
			createFromBookmark: function(editable, bookmark) {
				var sc = dom.fromOffsetPath(editable, bookmark.s.path);
				var so = bookmark.s.offset;
				var ec = dom.fromOffsetPath(editable, bookmark.e.path);
				var eo = bookmark.e.offset;
				return new WrappedRange(sc, so, ec, eo);
			},

			/**
			 * @method
			 *
			 * create WrappedRange from paraBookmark
			 *
			 * @param {Object} bookmark
			 * @param {Node[]} paras
			 * @return {WrappedRange}
			 */
			createFromParaBookmark: function(bookmark, paras) {
				var so = bookmark.s.offset;
				var eo = bookmark.e.offset;
				var sc = dom.fromOffsetPath(list.head(paras), bookmark.s.path);
				var ec = dom.fromOffsetPath(list.last(paras), bookmark.e.path);

				return new WrappedRange(sc, so, ec, eo);
			}
		};
	})();

	/**
	 * @class core.async
	 *
	 * Async functions which returns `Promise`
	 *
	 * @singleton
	 * @alternateClassName async
	 */
	var async = (function() {
		/**
		 * @method readFileAsDataURL
		 *
		 * read contents of file as representing URL
		 *
		 * @param {File} file
		 * @return {Promise} - then: dataUrl
		 */
		var readFileAsDataURL = function(file) {
			return $.Deferred(function(deferred) {
				$.extend(new FileReader(), {
					onload: function(e) {
						var dataURL = e.target.result;
						deferred.resolve(dataURL);
					},
					onerror: function() {
						deferred.reject(this);
					}
				}).readAsDataURL(file);
			}).promise();
		};

		/**
		 * @method createImage
		 *
		 * create `<image>` from url string
		 *
		 * @param {String} url
		 * @return {Promise} - then: $image
		 */
		var createImage = function(url) {
			return $.Deferred(function(deferred) {
				var $img = $('<img>');

				$img.one('load', function() {
					$img.off('error abort');
					deferred.resolve($img);
				}).one('error abort', function() {
					$img.off('load').detach();
					deferred.reject($img);
				}).css({
					display: 'none'
				}).appendTo(document.body).attr('src', url);
			}).promise();
		};

		return {
			readFileAsDataURL: readFileAsDataURL,
			createImage: createImage
		};
	})();

	/**
	 * @class editing.History
	 *
	 * Editor History
	 *
	 */
	var History = function($editable) {
		var stack = [],
			stackOffset = -1;
		var editable = $editable[0];

		var makeSnapshot = function() {
			var rng = range.create();
			var emptyBookmark = {
				s: {
					path: [],
					offset: 0
				},
				e: {
					path: [],
					offset: 0
				}
			};

			return {
				contents: $editable.html(),
				bookmark: (rng ? rng.bookmark(editable) : emptyBookmark)
			};
		};

		var applySnapshot = function(snapshot) {
			if (snapshot.contents !== null) {
				$editable.html(snapshot.contents);
			}
			if (snapshot.bookmark !== null) {
				range.createFromBookmark(editable, snapshot.bookmark).select();
			}
		};

		/**
		 * @method rewind
		 * Rewinds the history stack back to the first snapshot taken.
		 * Leaves the stack intact, so that "Redo" can still be used.
		 */
		this.rewind = function() {

			// Create snap shot if not yet recorded
			if ($editable.html() !== stack[stackOffset].contents) {
				this.recordUndo();
			}

			// Return to the first available snapshot.
			stackOffset = 0;

			// Apply that snapshot.
			applySnapshot(stack[stackOffset]);

		};


		/**
		 * @method reset
		 * Resets the history stack completely; reverting to an empty editor.
		 */
		this.reset = function() {

			// Clear the stack.
			stack = [];

			// Restore stackOffset to its original value.
			stackOffset = -1;

			// Clear the editable area.
			$editable.html('');

			// Record our first snapshot (of nothing).
			this.recordUndo();

		};

		/**
		 * undo
		 */
		this.undo = function() {
			// Create snap shot if not yet recorded
			if ($editable.html() !== stack[stackOffset].contents) {
				this.recordUndo();
			}

			if (0 < stackOffset) {
				stackOffset--;
				applySnapshot(stack[stackOffset]);
			}
		};

		/**
		 * redo
		 */
		this.redo = function() {
			if (stack.length - 1 > stackOffset) {
				stackOffset++;
				applySnapshot(stack[stackOffset]);
			}
		};

		/**
		 * recorded undo
		 */
		this.recordUndo = function() {
			stackOffset++;

			// Wash out stack after stackOffset
			if (stack.length > stackOffset) {
				stack = stack.slice(0, stackOffset);
			}

			// Create new snapshot and push it to the end
			stack.push(makeSnapshot());
		};
	};

	/**
	 * @class editing.Style
	 *
	 * Style
	 *
	 */
	var Style = function() {
		/**
		 * @method jQueryCSS
		 *
		 * [workaround] for old jQuery
		 * passing an array of style properties to .css()
		 * will result in an object of property-value pairs.
		 * (compability with version < 1.9)
		 *
		 * @private
		 * @param  {jQuery} $obj
		 * @param  {Array} propertyNames - An array of one or more CSS properties.
		 * @return {Object}
		 */
		var jQueryCSS = function($obj, propertyNames) {
			if (agent.jqueryVersion < 1.9) {
				var result = {};
				$.each(propertyNames, function(idx, propertyName) {
					result[propertyName] = $obj.css(propertyName);
				});
				return result;
			}
			return $obj.css.call($obj, propertyNames);
		};

		/**
		 * returns style object from node
		 *
		 * @param {jQuery} $node
		 * @return {Object}
		 */
		this.fromNode = function($node) {
			var properties = ['font-family', 'font-size', 'text-align', 'list-style-type', 'line-height'];
			var styleInfo = jQueryCSS($node, properties) || {};
			styleInfo['font-size'] = parseInt(styleInfo['font-size'], 10);
			return styleInfo;
		};

		/**
		 * paragraph level style
		 *
		 * @param {WrappedRange} rng
		 * @param {Object} styleInfo
		 */
		this.stylePara = function(rng, styleInfo) {
			$.each(rng.nodes(dom.isPara, {
				includeAncestor: true
			}), function(idx, para) {
				$(para).css(styleInfo);
			});
		};

		/**
		 * insert and returns styleNodes on range.
		 *
		 * @param {WrappedRange} rng
		 * @param {Object} [options] - options for styleNodes
		 * @param {String} [options.nodeName] - default: `SPAN`
		 * @param {Boolean} [options.expandClosestSibling] - default: `false`
		 * @param {Boolean} [options.onlyPartialContains] - default: `false`
		 * @return {Node[]}
		 */
		this.styleNodes = function(rng, options) {
			rng = rng.splitText();

			var nodeName = options && options.nodeName || 'SPAN';
			var expandClosestSibling = !!(options && options.expandClosestSibling);
			var onlyPartialContains = !!(options && options.onlyPartialContains);

			if (rng.isCollapsed()) {
				return [rng.insertNode(dom.create(nodeName))];
			}

			var pred = dom.makePredByNodeName(nodeName);
			var nodes = rng.nodes(dom.isText, {
				fullyContains: true
			}).map(function(text) {
				return dom.singleChildAncestor(text, pred) || dom.wrap(text, nodeName);
			});

			if (expandClosestSibling) {
				if (onlyPartialContains) {
					var nodesInRange = rng.nodes();
					// compose with partial contains predication
					pred = func.and(pred, function(node) {
						return list.contains(nodesInRange, node);
					});
				}

				return nodes.map(function(node) {
					var siblings = dom.withClosestSiblings(node, pred);
					var head = list.head(siblings);
					var tails = list.tail(siblings);
					$.each(tails, function(idx, elem) {
						dom.appendChildNodes(head, elem.childNodes);
						dom.remove(elem);
					});
					return list.head(siblings);
				});
			} else {
				return nodes;
			}
		};

		/**
		 * get current style on cursor
		 *
		 * @param {WrappedRange} rng
		 * @return {Object} - object contains style properties.
		 */
		this.current = function(rng) {
			var $cont = $(!dom.isElement(rng.sc) ? rng.sc.parentNode : rng.sc);
			var styleInfo = this.fromNode($cont);

			// document.queryCommandState for toggle state
			// [workaround] prevent Firefox nsresult: "0x80004005 (NS_ERROR_FAILURE)"
			try {
				styleInfo = $.extend(styleInfo, {
					'font-bold': document.queryCommandState('bold') ? 'bold' : 'normal',
					'font-italic': document.queryCommandState('italic') ? 'italic' : 'normal',
					'font-underline': document.queryCommandState('underline') ? 'underline' : 'normal',
					'font-subscript': document.queryCommandState('subscript') ? 'subscript' : 'normal',
					'font-superscript': document.queryCommandState('superscript') ? 'superscript' : 'normal',
					'font-strikethrough': document.queryCommandState('strikethrough') ? 'strikethrough' : 'normal'
				});
			} catch (e) {}

			// list-style-type to list-style(unordered, ordered)
			if (!rng.isOnList()) {
				styleInfo['list-style'] = 'none';
			} else {
				var orderedTypes = ['circle', 'disc', 'disc-leading-zero', 'square'];
				var isUnordered = $.inArray(styleInfo['list-style-type'], orderedTypes) > -1;
				styleInfo['list-style'] = isUnordered ? 'unordered' : 'ordered';
			}

			var para = dom.ancestor(rng.sc, dom.isPara);
			if (para && para.style['line-height']) {
				styleInfo['line-height'] = para.style.lineHeight;
			} else {
				var lineHeight = parseInt(styleInfo['line-height'], 10) / parseInt(styleInfo['font-size'], 10);
				styleInfo['line-height'] = lineHeight.toFixed(1);
			}

			styleInfo.anchor = rng.isOnAnchor() && dom.ancestor(rng.sc, dom.isAnchor);
			styleInfo.ancestors = dom.listAncestor(rng.sc, dom.isEditable);
			styleInfo.range = rng;

			return styleInfo;
		};
	};


	/**
	 * @class editing.Bullet
	 *
	 * @alternateClassName Bullet
	 */
	var Bullet = function() {
		/**
		 * @method insertOrderedList
		 *
		 * toggle ordered list
		 *
		 * @type command
		 */
		this.insertOrderedList = function() {
			this.toggleList('OL');
		};

		/**
		 * @method insertUnorderedList
		 *
		 * toggle unordered list
		 *
		 * @type command
		 */
		this.insertUnorderedList = function() {
			this.toggleList('UL');
		};

		/**
		 * @method indent
		 *
		 * indent
		 *
		 * @type command
		 */
		this.indent = function() {
			var self = this;
			var rng = range.create().wrapBodyInlineWithPara();

			var paras = rng.nodes(dom.isPara, {
				includeAncestor: true
			});
			var clustereds = list.clusterBy(paras, func.peq2('parentNode'));

			$.each(clustereds, function(idx, paras) {
				var head = list.head(paras);
				if (dom.isLi(head)) {
					self.wrapList(paras, head.parentNode.nodeName);
				} else {
					$.each(paras, function(idx, para) {
						$(para).css('marginLeft', function(idx, val) {
							return (parseInt(val, 10) || 0) + 25;
						});
					});
				}
			});

			rng.select();
		};

		/**
		 * @method outdent
		 *
		 * outdent
		 *
		 * @type command
		 */
		this.outdent = function() {
			var self = this;
			var rng = range.create().wrapBodyInlineWithPara();

			var paras = rng.nodes(dom.isPara, {
				includeAncestor: true
			});
			var clustereds = list.clusterBy(paras, func.peq2('parentNode'));

			$.each(clustereds, function(idx, paras) {
				var head = list.head(paras);
				if (dom.isLi(head)) {
					self.releaseList([paras]);
				} else {
					$.each(paras, function(idx, para) {
						$(para).css('marginLeft', function(idx, val) {
							val = (parseInt(val, 10) || 0);
							return val > 25 ? val - 25 : '';
						});
					});
				}
			});

			rng.select();
		};

		/**
		 * @method toggleList
		 *
		 * toggle list
		 *
		 * @param {String} listName - OL or UL
		 */
		this.toggleList = function(listName) {
			var self = this;
			var rng = range.create().wrapBodyInlineWithPara();

			var paras = rng.nodes(dom.isPara, {
				includeAncestor: true
			});
			var bookmark = rng.paraBookmark(paras);
			var clustereds = list.clusterBy(paras, func.peq2('parentNode'));

			// paragraph to list
			if (list.find(paras, dom.isPurePara)) {
				var wrappedParas = [];
				$.each(clustereds, function(idx, paras) {
					wrappedParas = wrappedParas.concat(self.wrapList(paras, listName));
				});
				paras = wrappedParas;
				// list to paragraph or change list style
			} else {
				var diffLists = rng.nodes(dom.isList, {
					includeAncestor: true
				}).filter(function(listNode) {
					return !$.nodeName(listNode, listName);
				});

				if (diffLists.length) {
					$.each(diffLists, function(idx, listNode) {
						dom.replace(listNode, listName);
					});
				} else {
					paras = this.releaseList(clustereds, true);
				}
			}

			range.createFromParaBookmark(bookmark, paras).select();
		};

		/**
		 * @method wrapList
		 *
		 * @param {Node[]} paras
		 * @param {String} listName
		 * @return {Node[]}
		 */
		this.wrapList = function(paras, listName) {
			var head = list.head(paras);
			var last = list.last(paras);

			var prevList = dom.isList(head.previousSibling) && head.previousSibling;
			var nextList = dom.isList(last.nextSibling) && last.nextSibling;

			var listNode = prevList || dom.insertAfter(dom.create(listName || 'UL'), last);

			// P to LI
			paras = paras.map(function(para) {
				return dom.isPurePara(para) ? dom.replace(para, 'LI') : para;
			});

			// append to list(<ul>, <ol>)
			dom.appendChildNodes(listNode, paras);

			if (nextList) {
				dom.appendChildNodes(listNode, list.from(nextList.childNodes));
				dom.remove(nextList);
			}

			return paras;
		};

		/**
		 * @method releaseList
		 *
		 * @param {Array[]} clustereds
		 * @param {Boolean} isEscapseToBody
		 * @return {Node[]}
		 */
		this.releaseList = function(clustereds, isEscapseToBody) {
			var releasedParas = [];

			$.each(clustereds, function(idx, paras) {
				var head = list.head(paras);
				var last = list.last(paras);

				var headList = isEscapseToBody ? dom.lastAncestor(head, dom.isList) :
					head.parentNode;
				var lastList = headList.childNodes.length > 1 ? dom.splitTree(headList, {
					node: last.parentNode,
					offset: dom.position(last) + 1
				}, {
					isSkipPaddingBlankHTML: true
				}) : null;

				var middleList = dom.splitTree(headList, {
					node: head.parentNode,
					offset: dom.position(head)
				}, {
					isSkipPaddingBlankHTML: true
				});

				paras = isEscapseToBody ? dom.listDescendant(middleList, dom.isLi) :
					list.from(middleList.childNodes).filter(dom.isLi);

				// LI to P
				if (isEscapseToBody || !dom.isList(headList.parentNode)) {
					paras = paras.map(function(para) {
						return dom.replace(para, 'P');
					});
				}

				$.each(list.from(paras).reverse(), function(idx, para) {
					dom.insertAfter(para, headList);
				});

				// remove empty lists
				var rootLists = list.compact([headList, middleList, lastList]);
				$.each(rootLists, function(idx, rootList) {
					var listNodes = [rootList].concat(dom.listDescendant(rootList, dom.isList));
					$.each(listNodes.reverse(), function(idx, listNode) {
						if (!dom.nodeLength(listNode)) {
							dom.remove(listNode, true);
						}
					});
				});

				releasedParas = releasedParas.concat(paras);
			});

			return releasedParas;
		};
	};


	/**
	 * @class editing.Typing
	 *
	 * Typing
	 *
	 */
	var Typing = function() {

		// a Bullet instance to toggle lists off
		var bullet = new Bullet();

		/**
		 * insert tab
		 *
		 * @param {jQuery} $editable
		 * @param {WrappedRange} rng
		 * @param {Number} tabsize
		 */
		this.insertTab = function($editable, rng, tabsize) {
			var tab = dom.createText(new Array(tabsize + 1).join(dom.NBSP_CHAR));
			rng = rng.deleteContents();
			rng.insertNode(tab, true);

			rng = range.create(tab, tabsize);
			rng.select();
		};

		/**
		 * insert paragraph
		 */
		this.insertParagraph = function($editable) {
			var rng = range.create();

			// deleteContents on range.
			rng = rng.deleteContents();

			// Wrap range if it needs to be wrapped by paragraph
			rng = rng.wrapBodyInlineWithPara();

			// finding paragraph
			var splitRoot = dom.ancestor(rng.sc, dom.isPara);

			var nextPara;
			// on paragraph: split paragraph
			if (splitRoot) {
				// if it is an empty line with li
				if (dom.isEmpty(splitRoot) && dom.isLi(splitRoot)) {
					// toogle UL/OL and escape
					bullet.toggleList(splitRoot.parentNode.nodeName);
					return;
					// if it is an empty line with para on blockquote
				} else if (dom.isEmpty(splitRoot) && dom.isPara(splitRoot) && dom.isBlockquote(splitRoot.parentNode)) {
					// escape blockquote
					dom.insertAfter(splitRoot, splitRoot.parentNode);
					nextPara = splitRoot;
					// if new line has content (not a line break)
				} else {
					nextPara = dom.splitTree(splitRoot, rng.getStartPoint());

					var emptyAnchors = dom.listDescendant(splitRoot, dom.isEmptyAnchor);
					emptyAnchors = emptyAnchors.concat(dom.listDescendant(nextPara, dom.isEmptyAnchor));

					$.each(emptyAnchors, function(idx, anchor) {
						dom.remove(anchor);
					});

					// replace empty heading or pre with P tag
					if ((dom.isHeading(nextPara) || dom.isPre(nextPara)) && dom.isEmpty(nextPara)) {
						nextPara = dom.replace(nextPara, 'p');
					}
				}
				// no paragraph: insert empty paragraph
			} else {
				var next = rng.sc.childNodes[rng.so];
				nextPara = $(dom.emptyPara)[0];
				if (next) {
					rng.sc.insertBefore(nextPara, next);
				} else {
					rng.sc.appendChild(nextPara);
				}
			}

			range.create(nextPara, 0).normalize().select().scrollIntoView($editable);
		};
	};

	/**
	 * @class editing.Table
	 *
	 * Table
	 *
	 */
	var Table = function() {
		/**
		 * handle tab key
		 *
		 * @param {WrappedRange} rng
		 * @param {Boolean} isShift
		 */
		this.tab = function(rng, isShift) {
			var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
			var table = dom.ancestor(cell, dom.isTable);
			var cells = dom.listDescendant(table, dom.isCell);

			var nextCell = list[isShift ? 'prev' : 'next'](cells, cell);
			if (nextCell) {
				range.create(nextCell, 0).select();
			}
		};

		/**
		 * create empty table element
		 *
		 * @param {Number} rowCount
		 * @param {Number} colCount
		 * @return {Node}
		 */
		this.createTable = function(colCount, rowCount, options) {
			var tds = [],
				tdHTML;
			for (var idxCol = 0; idxCol < colCount; idxCol++) {
				tds.push('<td>' + dom.blank + '</td>');
			}
			tdHTML = tds.join('');

			var trs = [],
				trHTML;
			for (var idxRow = 0; idxRow < rowCount; idxRow++) {
				trs.push('<tr>' + tdHTML + '</tr>');
			}
			trHTML = trs.join('');
			var $table = $('<table>' + trHTML + '</table>');
			if (options && options.tableClassName) {
				$table.addClass(options.tableClassName);
			}

			return $table[0];
		};
	};


	var KEY_BOGUS = 'bogus';

	/**
	 * @class Editor
	 */
	var Editor = function(context) {
		var self = this;

		var $note = context.layoutInfo.note;
		var $editor = context.layoutInfo.editor;
		var $editable = context.layoutInfo.editable;
		var options = context.options;
		var lang = options.langInfo;

		var style = new Style();
		var table = new Table();
		var typing = new Typing();
		var bullet = new Bullet();
		var history = new History($editable);

		this.initialize = function() {
			// bind custom events
			$editable.on('keydown', function(event) {
				if (event.keyCode === key.code.ENTER) {
					context.triggerEvent('enter', event);
				}
				context.triggerEvent('keydown', event);

				if (options.shortcuts && !event.isDefaultPrevented()) {
					self.handleKeyMap(event);
				}
			}).on('keyup', function(event) {
				context.triggerEvent('keyup', event);
			}).on('focus', function(event) {
				context.triggerEvent('focus', event);
			}).on('blur', function(event) {
				context.triggerEvent('blur', event);
			}).on('mousedown', function(event) {
				context.triggerEvent('mousedown', event);
			}).on('mouseup', function(event) {
				context.triggerEvent('mouseup', event);
			}).on('scroll', function(event) {
				context.triggerEvent('scroll', event);
			}).on('paste', function(event) {
				context.triggerEvent('paste', event);
			});

			// [workaround] IE doesn't have input events for contentEditable
			// - see: https://goo.gl/4bfIvA
			var changeEventName = agent.isMSIE ? 'DOMCharacterDataModified DOMSubtreeModified DOMNodeInserted' : 'input';
			$editable.on(changeEventName, function() {
				context.triggerEvent('change', $editable.html());
			});

			$editor.on('focusin', function(event) {
				context.triggerEvent('focusin', event);
			}).on('focusout', function(event) {
				context.triggerEvent('focusout', event);
			});

			if (!options.airMode && options.height) {
				$editable.outerHeight(options.height);
			}
			if (!options.airMode && options.maxHeight) {
				$editable.css('max-height', options.maxHeight);
			}
			if (!options.airMode && options.minHeight) {
				$editable.css('min-height', options.minHeight);
			}

			$editable.html(dom.html($note) || dom.emptyPara);
			history.recordUndo();
		};

		this.destroy = function() {
			$editable.off();
		};

		this.handleKeyMap = function(event) {
			var keyMap = options.keyMap[agent.isMac ? 'mac' : 'pc'];
			var keys = [];

			if (event.metaKey) {
				keys.push('CMD');
			}
			if (event.ctrlKey && !event.altKey) {
				keys.push('CTRL');
			}
			if (event.shiftKey) {
				keys.push('SHIFT');
			}

			var keyName = key.nameFromCode[event.keyCode];
			if (keyName) {
				keys.push(keyName);
			}

			var eventName = keyMap[keys.join('+')];
			if (eventName) {
				event.preventDefault();
				context.invoke(eventName);
			} else if (key.isEdit(event.keyCode)) {
				this.afterCommand();
			}
		};

		/**
		 * createRange
		 *
		 * create range
		 * @return {WrappedRange}
		 */
		this.createRange = function() {
			this.focus();
			return range.create();
		};

		/**
		 * saveRange
		 *
		 * save current range
		 *
		 * @param {Boolean} [thenCollapse=false]
		 */
		this.saveRange = function(thenCollapse) {
			this.focus();
			$editable.data('range', range.create());
			if (thenCollapse) {
				range.create().collapse().select();
			}
		};

		/**
		 * restoreRange
		 *
		 * restore lately range
		 */
		this.restoreRange = function() {
			var rng = $editable.data('range');
			if (rng) {
				rng.select();
				this.focus();
			}
		};

		this.saveTarget = function(node) {
			$editable.data('target', node);
		};

		this.clearTarget = function() {
			$editable.removeData('target');
		};

		this.restoreTarget = function() {
			return $editable.data('target');
		};

		/**
		 * currentStyle
		 *
		 * current style
		 * @return {Object|Boolean} unfocus
		 */
		this.currentStyle = function() {
			var rng = range.create();
			if (rng) {
				rng = rng.normalize();
			}
			return rng ? style.current(rng) : style.fromNode($editable);
		};

		/**
		 * style from node
		 *
		 * @param {jQuery} $node
		 * @return {Object}
		 */
		this.styleFromNode = function($node) {
			return style.fromNode($node);
		};

		/**
		 * undo
		 */
		this.undo = function() {
			context.triggerEvent('before.command', $editable.html());
			history.undo();
			context.triggerEvent('change', $editable.html());
		};
		context.memo('help.undo', lang.help.undo);

		/**
		 * redo
		 */
		this.redo = function() {
			context.triggerEvent('before.command', $editable.html());
			history.redo();
			context.triggerEvent('change', $editable.html());
		};
		context.memo('help.redo', lang.help.redo);

		/**
		 * beforeCommand
		 * before command
		 */
		var beforeCommand = this.beforeCommand = function() {
			context.triggerEvent('before.command', $editable.html());
			// keep focus on editable before command execution
			self.focus();
		};

		/**
		 * afterCommand
		 * after command
		 * @param {Boolean} isPreventTrigger
		 */
		var afterCommand = this.afterCommand = function(isPreventTrigger) {
			history.recordUndo();
			if (!isPreventTrigger) {
				context.triggerEvent('change', $editable.html());
			}
		};

		/* jshint ignore:start */
		// native commands(with execCommand), generate function for execCommand
		var commands = ['bold', 'italic', 'underline', 'strikethrough', 'superscript', 'subscript',
			'justifyLeft', 'justifyCenter', 'justifyRight', 'justifyFull',
			'formatBlock', 'removeFormat',
			'backColor', 'foreColor', 'fontName'
		];

		for (var idx = 0, len = commands.length; idx < len; idx++) {
			this[commands[idx]] = (function(sCmd) {
				return function(value) {
					beforeCommand();
					document.execCommand(sCmd, false, value);
					afterCommand(true);
				};
			})(commands[idx]);
			context.memo('help.' + commands[idx], lang.help[commands[idx]]);
		}
		/* jshint ignore:end */

		/**
		 * tab
		 *
		 * handle tab key
		 */
		this.tab = function() {
			var rng = this.createRange();
			if (rng.isCollapsed() && rng.isOnCell()) {
				table.tab(rng);
			} else {
				beforeCommand();
				typing.insertTab($editable, rng, options.tabSize);
				afterCommand();
			}
		};
		context.memo('help.tab', lang.help.tab);

		/**
		 * untab
		 *
		 * handle shift+tab key
		 *
		 */
		this.untab = function() {
			var rng = this.createRange();
			if (rng.isCollapsed() && rng.isOnCell()) {
				table.tab(rng, true);
			}
		};
		context.memo('help.untab', lang.help.untab);

		/**
		 * wrapCommand
		 *
		 * run given function between beforeCommand and afterCommand
		 */
		this.wrapCommand = function(fn) {
			return function() {
				beforeCommand();
				fn.apply(self, arguments);
				afterCommand();
			};
		};

		/**
		 * insertParagraph
		 *
		 * insert paragraph
		 */
		this.insertParagraph = this.wrapCommand(function() {
			typing.insertParagraph($editable);
		});
		context.memo('help.insertParagraph', lang.help.insertParagraph);

		/**
		 * insertOrderedList
		 */
		this.insertOrderedList = this.wrapCommand(function() {
			bullet.insertOrderedList($editable);
		});
		context.memo('help.insertOrderedList', lang.help.insertOrderedList);

		this.insertUnorderedList = this.wrapCommand(function() {
			bullet.insertUnorderedList($editable);
		});
		context.memo('help.insertUnorderedList', lang.help.insertUnorderedList);

		this.indent = this.wrapCommand(function() {
			bullet.indent($editable);
		});
		context.memo('help.indent', lang.help.indent);

		this.outdent = this.wrapCommand(function() {
			bullet.outdent($editable);
		});
		context.memo('help.outdent', lang.help.outdent);

		/**
		 * insert image
		 *
		 * @param {String} src
		 * @param {String|Function} param
		 * @return {Promise}
		 */
		this.insertImage = function(src, param) {
			return async.createImage(src, param).then(function($image) {
				beforeCommand();

				if (typeof param === 'function') {
					param($image);
				} else {
					if (typeof param === 'string') {
						$image.attr('data-filename', param);
					}
					$image.css('width', Math.min($editable.width(), $image.width()));
				}

				$image.show();
				range.create().insertNode($image[0]);
				range.createFromNodeAfter($image[0]).select();
				afterCommand();
			}).fail(function() {
				context.triggerEvent('image.upload.error');
			});
		};

		/**
		 * insertImages
		 * @param {File[]} files
		 */
		this.insertImages = function(files) {
			$.each(files, function(idx, file) {
				var filename = file.name;
				if (options.maximumImageFileSize && options.maximumImageFileSize < file.size) {
					context.triggerEvent('image.upload.error', lang.image.maximumFileSizeError);
				} else {
					async.readFileAsDataURL(file).then(function(dataURL) {
						return self.insertImage(dataURL, filename);
					}).fail(function() {
						context.triggerEvent('image.upload.error');
					});
				}
			});
		};

		/**
		 * insertImagesOrCallback
		 * @param {File[]} files
		 */
		this.insertImagesOrCallback = function(files) {
			var callbacks = options.callbacks;

			// If onImageUpload options setted
			if (callbacks.onImageUpload) {
				context.triggerEvent('image.upload', files);
				// else insert Image as dataURL
			} else {
				this.insertImages(files);
			}
		};

		/**
		 * insertNode
		 * insert node
		 * @param {Node} node
		 */
		this.insertNode = this.wrapCommand(function(node) {
			range.create().insertNode(node);
			range.createFromNodeAfter(node).select();
		});

		/**
		 * insert text
		 * @param {String} text
		 */
		this.insertText = this.wrapCommand(function(text) {
			var textNode = range.create().insertNode(dom.createText(text));
			range.create(textNode, dom.nodeLength(textNode)).select();
		});

		/**
		 * return selected plain text
		 * @return {String} text
		 */
		this.getSelectedText = function() {
			var rng = this.createRange();

			// if range on anchor, expand range with anchor
			if (rng.isOnAnchor()) {
				rng = range.createFromNode(dom.ancestor(rng.sc, dom.isAnchor));
			}

			return rng.toString();
		};

		/**
		 * paste HTML
		 * @param {String} markup
		 */
		this.pasteHTML = this.wrapCommand(function(markup) {
			var contents = range.create().pasteHTML(markup);
			range.createFromNodeAfter(list.last(contents)).select();
		});

		/**
		 * formatBlock
		 *
		 * @param {String} tagName
		 */
		this.formatBlock = this.wrapCommand(function(tagName) {
			// [workaround] for MSIE, IE need `<`
			tagName = agent.isMSIE ? '<' + tagName + '>' : tagName;
			document.execCommand('FormatBlock', false, tagName);
		});

		this.formatPara = function() {
			this.formatBlock('P');
		};
		context.memo('help.formatPara', lang.help.formatPara);

		/* jshint ignore:start */
		for (var idx = 1; idx <= 6; idx++) {
			this['formatH' + idx] = function(idx) {
				return function() {
					this.formatBlock('H' + idx);
				};
			}(idx);
			context.memo('help.formatH' + idx, lang.help['formatH' + idx]);
		};
		/* jshint ignore:end */


		/**
		 * fontSize
		 *
		 * @param {String} value - px
		 */
		this.fontSize = function(value) {
			this.focus();
			var rng = range.create();

			if (rng && rng.isCollapsed()) {
				var spans = style.styleNodes(rng);
				var firstSpan = list.head(spans);

				$(spans).css({
					'font-size': value + 'px'
				});

				// [workaround] added styled bogus span for style
				//  - also bogus character needed for cursor position
				if (firstSpan && !dom.nodeLength(firstSpan)) {
					firstSpan.innerHTML = dom.ZERO_WIDTH_NBSP_CHAR;
					range.createFromNodeAfter(firstSpan.firstChild).select();
					$editable.data(KEY_BOGUS, firstSpan);
				}
			} else {
				beforeCommand();
				$(style.styleNodes(rng)).css({
					'font-size': value + 'px'
				});
				afterCommand();
			}
		};

		/**
		 * insert horizontal rule
		 */
		this.insertHorizontalRule = this.wrapCommand(function() {
			var rng = range.create();
			var hrNode = rng.insertNode($('<HR/>')[0]);
			if (hrNode.nextSibling) {
				range.create(hrNode.nextSibling, 0).normalize().select();
			}
		});
		context.memo('help.insertHorizontalRule', lang.help.insertHorizontalRule);


		/**
		 * remove bogus node and character
		 */
		this.removeBogus = function() {
			var bogusNode = $editable.data(KEY_BOGUS);
			if (!bogusNode) {
				return;
			}

			var textNode = list.find(list.from(bogusNode.childNodes), dom.isText);

			var bogusCharIdx = textNode.nodeValue.indexOf(dom.ZERO_WIDTH_NBSP_CHAR);
			if (bogusCharIdx !== -1) {
				textNode.deleteData(bogusCharIdx, 1);
			}

			if (dom.isEmpty(bogusNode)) {
				dom.remove(bogusNode);
			}

			$editable.removeData(KEY_BOGUS);
		};

		/**
		 * lineHeight
		 * @param {String} value
		 */
		this.lineHeight = this.wrapCommand(function(value) {
			style.stylePara(range.create(), {
				lineHeight: value
			});
		});

		/**
		 * unlink
		 *
		 * @type command
		 */
		this.unlink = function() {
			var rng = this.createRange();
			if (rng.isOnAnchor()) {
				var anchor = dom.ancestor(rng.sc, dom.isAnchor);
				rng = range.createFromNode(anchor);
				rng.select();

				beforeCommand();
				document.execCommand('unlink');
				afterCommand();
			}
		};

		/**
		 * create link (command)
		 *
		 * @param {Object} linkInfo
		 */
		this.createLink = this.wrapCommand(function(linkInfo) {
			var linkUrl = linkInfo.url;
			var linkText = linkInfo.text;
			var isNewWindow = linkInfo.isNewWindow;
			var rng = linkInfo.range || this.createRange();
			var isTextChanged = rng.toString() !== linkText;

			if (options.onCreateLink) {
				linkUrl = options.onCreateLink(linkUrl);
			}

			var anchors = [];
			if (isTextChanged) {
				// Create a new link when text changed.
				var anchor = rng.insertNode($('<A>' + linkText + '</A>')[0]);
				anchors.push(anchor);
			} else {
				anchors = style.styleNodes(rng, {
					nodeName: 'A',
					expandClosestSibling: true,
					onlyPartialContains: true
				});
			}

			$.each(anchors, function(idx, anchor) {
				$(anchor).attr('href', linkUrl);
				if (isNewWindow) {
					$(anchor).attr('target', '_blank');
				} else {
					$(anchor).removeAttr('target');
				}
			});

			var startRange = range.createFromNodeBefore(list.head(anchors));
			var startPoint = startRange.getStartPoint();
			var endRange = range.createFromNodeAfter(list.last(anchors));
			var endPoint = endRange.getEndPoint();

			range.create(
				startPoint.node,
				startPoint.offset,
				endPoint.node,
				endPoint.offset
			).select();
		});

		/**
		 * returns link info
		 *
		 * @return {Object}
		 * @return {WrappedRange} return.range
		 * @return {String} return.text
		 * @return {Boolean} [return.isNewWindow=true]
		 * @return {String} [return.url=""]
		 */
		this.getLinkInfo = function() {
			this.focus();

			var rng = range.create().expand(dom.isAnchor);

			// Get the first anchor on range(for edit).
			var $anchor = $(list.head(rng.nodes(dom.isAnchor)));

			return {
				range: rng,
				text: rng.toString(),
				isNewWindow: $anchor.length ? $anchor.attr('target') === '_blank' : false,
				url: $anchor.length ? $anchor.attr('href') : ''
			};
		};

		/**
		 * setting color
		 *
		 * @param {Object} sObjColor  color code
		 * @param {String} sObjColor.foreColor foreground color
		 * @param {String} sObjColor.backColor background color
		 */
		this.color = this.wrapCommand(function(colorInfo) {
			var foreColor = colorInfo.foreColor;
			var backColor = colorInfo.backColor;

			if (foreColor) {
				document.execCommand('foreColor', false, foreColor);
			}
			if (backColor) {
				document.execCommand('backColor', false, backColor);
			}
		});

		/**
		 * insert Table
		 *
		 * @param {String} sDim dimension of table (ex : "5x5")
		 */
		this.insertTable = this.wrapCommand(function(sDim) {
			var dimension = sDim.split('x');

			var rng = range.create().deleteContents();
			rng.insertNode(table.createTable(dimension[0], dimension[1], options));
		});

		/**
		 * float me
		 *
		 * @param {String} value
		 */
		this.floatMe = this.wrapCommand(function(value) {
			var $target = $(this.restoreTarget());
			$target.css('float', value);
		});

		/**
		 * resize overlay element
		 * @param {String} value
		 */
		this.resize = this.wrapCommand(function(value) {
			var $target = $(this.restoreTarget());
			$target.css({
				width: value * 100 + '%',
				height: ''
			});
		});

		/**
		 * @param {Position} pos
		 * @param {jQuery} $target - target element
		 * @param {Boolean} [bKeepRatio] - keep ratio
		 */
		this.resizeTo = function(pos, $target, bKeepRatio) {
			var imageSize;
			if (bKeepRatio) {
				var newRatio = pos.y / pos.x;
				var ratio = $target.data('ratio');
				imageSize = {
					width: ratio > newRatio ? pos.x : pos.y / ratio,
					height: ratio > newRatio ? pos.x * ratio : pos.y
				};
			} else {
				imageSize = {
					width: pos.x,
					height: pos.y
				};
			}

			$target.css(imageSize);
		};

		/**
		 * remove media object
		 */
		this.removeMedia = this.wrapCommand(function() {
			var $target = $(this.restoreTarget()).detach();
			context.triggerEvent('media.delete', $target, $editable);
		});

		/**
		 * returns whether editable area has focus or not.
		 */
		this.hasFocus = function() {
			return $editable.is(':focus');
		};

		/**
		 * set focus
		 */
		this.focus = function() {
			// [workaround] Screen will move when page is scolled in IE.
			//  - do focus when not focused
			if (!this.hasFocus()) {
				$editable.focus();

				// [workaround] for firefox bug http://goo.gl/lVfAaI
				if (!this.hasFocus() && agent.isFF) {
					range.createFromNode($editable[0])
						.normalize()
						.collapse()
						.select();
				}
			}
		};

		/**
		 * returns whether contents is empty or not.
		 * @return {Boolean}
		 */
		this.isEmpty = function() {
			return dom.isEmpty($editable[0]) || dom.emptyPara === $editable.html();
		};

		/**
		 * Removes all contents and restores the editable instance to an _emptyPara_.
		 */
		this.empty = function() {
			context.invoke('code', dom.emptyPara);
		};
	};

	var Clipboard = function(context) {
		var self = this;

		var $editable = context.layoutInfo.editable;

		this.events = {
			'summernote.keydown': function(we, e) {
				if (self.needKeydownHook()) {
					if ((e.ctrlKey || e.metaKey) && e.keyCode === key.code.V) {
						context.invoke('editor.saveRange');
						self.$paste.focus();

						setTimeout(function() {
							self.pasteByHook();
						}, 0);
					}
				}
			}
		};

		this.needKeydownHook = function() {
			return (agent.isMSIE && agent.browserVersion > 10) || agent.isFF;
		};

		this.initialize = function() {
			// [workaround] getting image from clipboard
			//  - IE11 and Firefox: CTRL+v hook
			//  - Webkit: event.clipboardData
			if (this.needKeydownHook()) {
				this.$paste = $('<div />').attr('contenteditable', true).css({
					position: 'absolute',
					left: -100000,
					opacity: 0
				});
				$editable.before(this.$paste);

				this.$paste.on('paste', function(event) {
					context.triggerEvent('paste', event);
				});
			} else {
				$editable.on('paste', this.pasteByEvent);
			}
		};

		this.destroy = function() {
			if (this.needKeydownHook()) {
				this.$paste.remove();
				this.$paste = null;
			}
		};

		this.pasteByHook = function() {
			var node = this.$paste[0].firstChild;

			if (dom.isImg(node)) {
				var dataURI = node.src;
				var decodedData = atob(dataURI.split(',')[1]);
				var array = new Uint8Array(decodedData.length);
				for (var i = 0; i < decodedData.length; i++) {
					array[i] = decodedData.charCodeAt(i);
				}

				var blob = new Blob([array], {
					type: 'image/png'
				});
				blob.name = 'clipboard.png';

				context.invoke('editor.restoreRange');
				context.invoke('editor.focus');
				context.invoke('editor.insertImagesOrCallback', [blob]);
			} else {
				var pasteContent = $('<div />').html(this.$paste.html()).html();
				context.invoke('editor.restoreRange');
				context.invoke('editor.focus');

				if (pasteContent) {
					context.invoke('editor.pasteHTML', pasteContent);
				}
			}

			this.$paste.empty();
		};

		/**
		 * paste by clipboard event
		 *
		 * @param {Event} event
		 */
		this.pasteByEvent = function(event) {
			var clipboardData = event.originalEvent.clipboardData;
			if (clipboardData && clipboardData.items && clipboardData.items.length) {
				var item = list.head(clipboardData.items);
				if (item.kind === 'file' && item.type.indexOf('image/') !== -1) {
					context.invoke('editor.insertImagesOrCallback', [item.getAsFile()]);
				}
				context.invoke('editor.afterCommand');
			}
		};
	};

	var Dropzone = function(context) {
		var $document = $(document);
		var $editor = context.layoutInfo.editor;
		var $editable = context.layoutInfo.editable;
		var options = context.options;
		var lang = options.langInfo;

		var $dropzone = $([
			'<div class="note-dropzone">',
			'  <div class="note-dropzone-message"/>',
			'</div>'
		].join('')).prependTo($editor);

		/**
		 * attach Drag and Drop Events
		 */
		this.initialize = function() {
			if (options.disableDragAndDrop) {
				// prevent default drop event
				$document.on('drop', function(e) {
					e.preventDefault();
				});
			} else {
				this.attachDragAndDropEvent();
			}
		};

		/**
		 * attach Drag and Drop Events
		 */
		this.attachDragAndDropEvent = function() {
			var collection = $(),
				$dropzoneMessage = $dropzone.find('.note-dropzone-message');

			// show dropzone on dragenter when dragging a object to document
			// -but only if the editor is visible, i.e. has a positive width and height
			$document.on('dragenter', function(e) {
				var isCodeview = context.invoke('codeview.isActivated');
				var hasEditorSize = $editor.width() > 0 && $editor.height() > 0;
				if (!isCodeview && !collection.length && hasEditorSize) {
					$editor.addClass('dragover');
					$dropzone.width($editor.width());
					$dropzone.height($editor.height());
					$dropzoneMessage.text(lang.image.dragImageHere);
				}
				collection = collection.add(e.target);
			}).on('dragleave', function(e) {
				collection = collection.not(e.target);
				if (!collection.length) {
					$editor.removeClass('dragover');
				}
			}).on('drop', function() {
				collection = $();
				$editor.removeClass('dragover');
			});

			// change dropzone's message on hover.
			$dropzone.on('dragenter', function() {
				$dropzone.addClass('hover');
				$dropzoneMessage.text(lang.image.dropImage);
			}).on('dragleave', function() {
				$dropzone.removeClass('hover');
				$dropzoneMessage.text(lang.image.dragImageHere);
			});

			// attach dropImage
			$dropzone.on('drop', function(event) {
				var dataTransfer = event.originalEvent.dataTransfer;

				if (dataTransfer && dataTransfer.files && dataTransfer.files.length) {
					event.preventDefault();
					$editable.focus();
					context.invoke('editor.insertImagesOrCallback', dataTransfer.files);
				} else {
					$.each(dataTransfer.types, function(idx, type) {
						var content = dataTransfer.getData(type);

						if (type.toLowerCase().indexOf('text') > -1) {
							context.invoke('editor.pasteHTML', content);
						} else {
							$(content).each(function() {
								context.invoke('editor.insertNode', this);
							});
						}
					});
				}
			}).on('dragover', false); // prevent default dragover event
		};
	};


	var CodeMirror;
	if (agent.hasCodeMirror) {
		if (agent.isSupportAmd) {
			require(['codemirror'], function(cm) {
				CodeMirror = cm;
			});
		} else {
			CodeMirror = window.CodeMirror;
		}
	}

	/**
	 * @class Codeview
	 */
	var Codeview = function(context) {
		var $editor = context.layoutInfo.editor;
		var $editable = context.layoutInfo.editable;
		var $codable = context.layoutInfo.codable;
		var options = context.options;

		this.sync = function() {
			var isCodeview = this.isActivated();
			if (isCodeview && agent.hasCodeMirror) {
				$codable.data('cmEditor').save();
			}
		};

		/**
		 * @return {Boolean}
		 */
		this.isActivated = function() {
			return $editor.hasClass('codeview');
		};

		/**
		 * toggle codeview
		 */
		this.toggle = function() {
			if (this.isActivated()) {
				this.deactivate();
			} else {
				this.activate();
			}
			context.triggerEvent('codeview.toggled');
		};

		/**
		 * activate code view
		 */
		this.activate = function() {
			$codable.val(dom.html($editable, options.prettifyHtml));
			$codable.height($editable.height());

			context.invoke('toolbar.updateCodeview', true);
			$editor.addClass('codeview');
			$codable.focus();

			// activate CodeMirror as codable
			if (agent.hasCodeMirror) {
				var cmEditor = CodeMirror.fromTextArea($codable[0], options.codemirror);

				// CodeMirror TernServer
				if (options.codemirror.tern) {
					var server = new CodeMirror.TernServer(options.codemirror.tern);
					cmEditor.ternServer = server;
					cmEditor.on('cursorActivity', function(cm) {
						server.updateArgHints(cm);
					});
				}

				// CodeMirror hasn't Padding.
				cmEditor.setSize(null, $editable.outerHeight());
				$codable.data('cmEditor', cmEditor);
			}
		};

		/**
		 * deactivate code view
		 */
		this.deactivate = function() {
			// deactivate CodeMirror as codable
			if (agent.hasCodeMirror) {
				var cmEditor = $codable.data('cmEditor');
				$codable.val(cmEditor.getValue());
				cmEditor.toTextArea();
			}

			var value = dom.value($codable, options.prettifyHtml) || dom.emptyPara;
			var isChange = $editable.html() !== value;

			$editable.html(value);
			$editable.height(options.height ? $codable.height() : 'auto');
			$editor.removeClass('codeview');

			if (isChange) {
				context.triggerEvent('change', $editable.html(), $editable);
			}

			$editable.focus();

			context.invoke('toolbar.updateCodeview', false);
		};

		this.destroy = function() {
			if (this.isActivated()) {
				this.deactivate();
			}
		};
	};

	var EDITABLE_PADDING = 24;

	var Statusbar = function(context) {
		var $document = $(document);
		var $statusbar = context.layoutInfo.statusbar;
		var $editable = context.layoutInfo.editable;
		var options = context.options;

		this.initialize = function() {
			if (options.airMode || options.disableResizeEditor) {
				return;
			}

			$statusbar.on('mousedown', function(event) {
				event.preventDefault();
				event.stopPropagation();

				var editableTop = $editable.offset().top - $document.scrollTop();

				$document.on('mousemove', function(event) {
					var height = event.clientY - (editableTop + EDITABLE_PADDING);

					height = (options.minheight > 0) ? Math.max(height, options.minheight) : height;
					height = (options.maxHeight > 0) ? Math.min(height, options.maxHeight) : height;

					$editable.height(height);
				}).one('mouseup', function() {
					$document.off('mousemove');
				});
			});
		};

		this.destroy = function() {
			$statusbar.off();
		};
	};

	var Fullscreen = function(context) {
		var $editor = context.layoutInfo.editor;
		var $toolbar = context.layoutInfo.toolbar;
		var $editable = context.layoutInfo.editable;
		var $codable = context.layoutInfo.codable;

		var $window = $(window);
		var $scrollbar = $('html, body');

		/**
		 * toggle fullscreen
		 */
		this.toggle = function() {
			var resize = function(size) {
				$editable.css('height', size.h);
				$codable.css('height', size.h);
				if ($codable.data('cmeditor')) {
					$codable.data('cmeditor').setsize(null, size.h);
				}
			};

			$editor.toggleClass('fullscreen');
			var isFullscreen = $editor.hasClass('fullscreen');
			if (isFullscreen) {
				$editable.data('orgHeight', $editable.css('height'));

				$window.on('resize', function() {
					resize({
						h: $window.height() - $toolbar.outerHeight()
					});
				}).trigger('resize');

				$scrollbar.css('overflow', 'hidden');
			} else {
				$window.off('resize');
				resize({
					h: $editable.data('orgHeight')
				});
				$scrollbar.css('overflow', 'visible');
			}

			context.invoke('toolbar.updateFullscreen', isFullscreen);
		};
	};

	var Handle = function(context) {
		var self = this;

		var $document = $(document);
		var $editingArea = context.layoutInfo.editingArea;
		var options = context.options;

		this.events = {
			'summernote.mousedown': function(we, e) {
				if (self.update(e.target)) {
					e.preventDefault();
				}
			},
			'summernote.keyup summernote.scroll summernote.change summernote.dialog.shown': function() {
				self.update();
			}
		};

		this.initialize = function() {
			this.$handle = $([
				'<div class="note-handle">',
				'<div class="note-control-selection">',
				'<div class="note-control-selection-bg"></div>',
				'<div class="note-control-holder note-control-nw"></div>',
				'<div class="note-control-holder note-control-ne"></div>',
				'<div class="note-control-holder note-control-sw"></div>',
				'<div class="', (options.disableResizeImage ? 'note-control-holder' : 'note-control-sizing'),
				' note-control-se"></div>', (options.disableResizeImage ? '' : '<div class="note-control-selection-info"></div>'),
				'</div>',
				'</div>'
			].join('')).prependTo($editingArea);

			this.$handle.on('mousedown', function(event) {
				if (dom.isControlSizing(event.target)) {
					event.preventDefault();
					event.stopPropagation();

					var $target = self.$handle.find('.note-control-selection').data('target'),
						posStart = $target.offset(),
						scrollTop = $document.scrollTop();

					$document.on('mousemove', function(event) {
						context.invoke('editor.resizeTo', {
							x: event.clientX - posStart.left,
							y: event.clientY - (posStart.top - scrollTop)
						}, $target, !event.shiftKey);

						self.update($target[0]);
					}).one('mouseup', function(e) {
						e.preventDefault();
						$document.off('mousemove');
						context.invoke('editor.afterCommand');
					});

					if (!$target.data('ratio')) { // original ratio.
						$target.data('ratio', $target.height() / $target.width());
					}
				}
			});
		};

		this.destroy = function() {
			this.$handle.remove();
		};

		this.update = function(target) {
			var isImage = dom.isImg(target);
			var $selection = this.$handle.find('.note-control-selection');

			context.invoke('imagePopover.update', target);

			if (isImage) {
				var $image = $(target);
				var pos = $image.position();

				// include margin
				var imageSize = {
					w: $image.outerWidth(true),
					h: $image.outerHeight(true)
				};

				$selection.css({
					display: 'block',
					left: pos.left,
					top: pos.top,
					width: imageSize.w,
					height: imageSize.h
				}).data('target', $image); // save current image element.

				var sizingText = imageSize.w + 'x' + imageSize.h;
				$selection.find('.note-control-selection-info').text(sizingText);
				context.invoke('editor.saveTarget', target);
			} else {
				this.hide();
			}

			return isImage;
		};

		/**
		 * hide
		 *
		 * @param {jQuery} $handle
		 */
		this.hide = function() {
			context.invoke('editor.clearTarget');
			this.$handle.children().hide();
		};
	};

	var AutoLink = function(context) {
		var self = this;
		var defaultScheme = 'http://';
		var linkPattern = /^(https?:\/\/|ssh:\/\/|ftp:\/\/|file:\/|mailto:[A-Z0-9._%+-]+@)?(www\.)?(.+)$/i;

		this.events = {
			'summernote.keyup': function(we, e) {
				if (!e.isDefaultPrevented()) {
					self.handleKeyup(e);
				}
			},
			'summernote.keydown': function(we, e) {
				self.handleKeydown(e);
			}
		};

		this.initialize = function() {
			this.lastWordRange = null;
		};

		this.destroy = function() {
			this.lastWordRange = null;
		};

		this.replace = function() {
			if (!this.lastWordRange) {
				return;
			}

			var keyword = this.lastWordRange.toString();
			var match = keyword.match(linkPattern);

			if (match && (match[1] || match[2])) {
				var link = match[1] ? keyword : defaultScheme + keyword;
				var node = $('<a />').html(keyword).attr('href', link)[0];

				this.lastWordRange.insertNode(node);
				this.lastWordRange = null;
				context.invoke('editor.focus');
			}

		};

		this.handleKeydown = function(e) {
			if (list.contains([key.code.ENTER, key.code.SPACE], e.keyCode)) {
				var wordRange = context.invoke('editor.createRange').getWordRange();
				this.lastWordRange = wordRange;
			}
		};

		this.handleKeyup = function(e) {
			if (list.contains([key.code.ENTER, key.code.SPACE], e.keyCode)) {
				this.replace();
			}
		};
	};

	/**
	 * textarea auto sync.
	 */
	var AutoSync = function(context) {
		var $note = context.layoutInfo.note;

		this.events = {
			'summernote.change': function() {
				$note.val(context.invoke('code'));
			}
		};

		this.shouldInitialize = function() {
			return dom.isTextarea($note[0]);
		};
	};

	var Placeholder = function(context) {
		var self = this;
		var $editingArea = context.layoutInfo.editingArea;
		var options = context.options;

		this.events = {
			'summernote.init summernote.change': function() {
				self.update();
			},
			'summernote.codeview.toggled': function() {
				self.update();
			}
		};

		this.shouldInitialize = function() {
			return !!options.placeholder;
		};

		this.initialize = function() {
			this.$placeholder = $('<div class="note-placeholder">');
			this.$placeholder.on('click', function() {
				context.invoke('focus');
			}).text(options.placeholder).prependTo($editingArea);
		};

		this.destroy = function() {
			this.$placeholder.remove();
		};

		this.update = function() {
			var isShow = !context.invoke('codeview.isActivated') && context.invoke('editor.isEmpty');
			this.$placeholder.toggle(isShow);
		};
	};

	var Buttons = function(context) {
		var self = this;
		var ui = $.summernote.ui;

		var $toolbar = context.layoutInfo.toolbar;
		var options = context.options;
		var lang = options.langInfo;

		var invertedKeyMap = func.invertObject(options.keyMap[agent.isMac ? 'mac' : 'pc']);

		var representShortcut = this.representShortcut = function(editorMethod) {
			var shortcut = invertedKeyMap[editorMethod];
			if (agent.isMac) {
				shortcut = shortcut.replace('CMD', '⌘').replace('SHIFT', '⇧');
			}

			shortcut = shortcut.replace('BACKSLASH', '\\')
				.replace('SLASH', '/')
				.replace('LEFTBRACKET', '[')
				.replace('RIGHTBRACKET', ']');

			return ' (' + shortcut + ')';
		};

		this.initialize = function() {
			this.addToolbarButtons();
			this.addImagePopoverButtons();
			this.addLinkPopoverButtons();
		};

		this.addToolbarButtons = function() {
			context.memo('button.style', function() {
				return ui.buttonGroup([
					ui.button({
						className: 'dropdown-toggle',
						contents: ui.icon(options.icons.magic) + ' ' + ui.icon(options.icons.caret, 'span'),
						tooltip: lang.style.style,
						data: {
							toggle: 'dropdown'
						}
					}),
					ui.dropdown({
						className: 'dropdown-style',
						items: context.options.styleTags,
						template: function(item) {

							if (typeof item === 'string') {
								item = {
									tag: item,
									title: item
								};
							}

							var tag = item.tag;
							var title = item.title;
							var style = item.style ? ' style="' + item.style + '" ' : '';
							var className = item.className ? ' className="' + item.className + '"' : '';

							return '<' + tag + style + className + '>' + title + '</' + tag + '>';
						},
						click: context.createInvokeHandler('editor.formatBlock')
					})
				]).render();
			});

			context.memo('button.bold', function() {
				return ui.button({
					className: 'note-btn-bold',
					contents: ui.icon(options.icons.bold),
					tooltip: lang.font.bold + representShortcut('bold'),
					click: context.createInvokeHandler('editor.bold')
				}).render();
			});

			context.memo('button.italic', function() {
				return ui.button({
					className: 'note-btn-italic',
					contents: ui.icon(options.icons.italic),
					tooltip: lang.font.italic + representShortcut('italic'),
					click: context.createInvokeHandler('editor.italic')
				}).render();
			});

			context.memo('button.underline', function() {
				return ui.button({
					className: 'note-btn-underline',
					contents: ui.icon(options.icons.underline),
					tooltip: lang.font.underline + representShortcut('underline'),
					click: context.createInvokeHandler('editor.underline')
				}).render();
			});

			context.memo('button.clear', function() {
				return ui.button({
					contents: ui.icon(options.icons.eraser),
					tooltip: lang.font.clear + representShortcut('removeFormat'),
					click: context.createInvokeHandler('editor.removeFormat')
				}).render();
			});

			context.memo('button.strikethrough', function() {
				return ui.button({
					className: 'note-btn-strikethrough',
					contents: ui.icon(options.icons.strikethrough),
					tooltip: lang.font.strikethrough + representShortcut('strikethrough'),
					click: context.createInvokeHandler('editor.strikethrough')
				}).render();
			});

			context.memo('button.superscript', function() {
				return ui.button({
					className: 'note-btn-superscript',
					contents: ui.icon(options.icons.superscript),
					tooltip: lang.font.superscript,
					click: context.createInvokeHandler('editor.superscript')
				}).render();
			});

			context.memo('button.subscript', function() {
				return ui.button({
					className: 'note-btn-subscript',
					contents: ui.icon(options.icons.subscript),
					tooltip: lang.font.subscript,
					click: context.createInvokeHandler('editor.subscript')
				}).render();
			});

			context.memo('button.fontname', function() {
				return ui.buttonGroup([
					ui.button({
						className: 'dropdown-toggle',
						contents: '<span class="note-current-fontname"/> ' + ui.icon(options.icons.caret, 'span'),
						tooltip: lang.font.name,
						data: {
							toggle: 'dropdown'
						}
					}),
					ui.dropdownCheck({
						className: 'dropdown-fontname',
						checkClassName: options.icons.menuCheck,
						items: options.fontNames.filter(function(name) {
							return agent.isFontInstalled(name) ||
								list.contains(options.fontNamesIgnoreCheck, name);
						}),
						template: function(item) {
							return '<span style="font-family:' + item + '">' + item + '</span>';
						},
						click: context.createInvokeHandler('editor.fontName')
					})
				]).render();
			});

			context.memo('button.fontsize', function() {
				return ui.buttonGroup([
					ui.button({
						className: 'dropdown-toggle',
						contents: '<span class="note-current-fontsize"/>' + ui.icon(options.icons.caret, 'span'),
						tooltip: lang.font.size,
						data: {
							toggle: 'dropdown'
						}
					}),
					ui.dropdownCheck({
						className: 'dropdown-fontsize',
						checkClassName: options.icons.menuCheck,
						items: options.fontSizes,
						click: context.createInvokeHandler('editor.fontSize')
					})
				]).render();
			});

			context.memo('button.color', function() {
				return ui.buttonGroup({
					className: 'note-color',
					children: [
						ui.button({
							className: 'note-current-color-button',
							contents: ui.icon(options.icons.font + ' note-recent-color'),
							tooltip: lang.color.recent,
							click: context.createInvokeHandler('editor.color'),
							callback: function($button) {
								var $recentColor = $button.find('.note-recent-color');
								$recentColor.css({
									'background-color': 'yellow'
								});

								$button.data('value', {
									backColor: 'yellow'
								});
							}
						}),
						ui.button({
							className: 'dropdown-toggle',
							contents: ui.icon(options.icons.caret, 'span'),
							tooltip: lang.color.more,
							data: {
								toggle: 'dropdown'
							}
						}),
						ui.dropdown({
							items: [
								'<li>',
								'<div class="btn-group">',
								'  <div class="note-palette-title">' + lang.color.background + '</div>',
								'  <div>',
								'    <button type="button" class="note-color-reset btn btn-default" data-event="backColor" data-value="inherit">',
								lang.color.transparent,
								'    </button>',
								'  </div>',
								'  <div class="note-holder" data-event="backColor"/>',
								'</div>',
								'<div class="btn-group">',
								'  <div class="note-palette-title">' + lang.color.foreground + '</div>',
								'  <div>',
								'    <button type="button" class="note-color-reset btn btn-default" data-event="removeFormat" data-value="foreColor">',
								lang.color.resetToDefault,
								'    </button>',
								'  </div>',
								'  <div class="note-holder" data-event="foreColor"/>',
								'</div>',
								'</li>'
							].join(''),
							callback: function($dropdown) {
								$dropdown.find('.note-holder').each(function() {
									var $holder = $(this);
									$holder.append(ui.palette({
										colors: options.colors,
										eventName: $holder.data('event')
									}).render());
								});
							},
							click: function(event) {
								var $button = $(event.target);
								var eventName = $button.data('event');
								var value = $button.data('value');

								if (eventName && value) {
									var key = eventName === 'backColor' ? 'background-color' : 'color';
									var $color = $button.closest('.note-color').find('.note-recent-color');
									var $currentButton = $button.closest('.note-color').find('.note-current-color-button');

									var colorInfo = $currentButton.data('value');
									colorInfo[eventName] = value;
									$color.css(key, value);
									$currentButton.data('value', colorInfo);

									context.invoke('editor.' + eventName, value);
								}
							}
						})
					]
				}).render();
			});

			context.memo('button.ol', function() {
				return ui.button({
					contents: ui.icon(options.icons.unorderedlist),
					tooltip: lang.lists.unordered + representShortcut('insertUnorderedList'),
					click: context.createInvokeHandler('editor.insertUnorderedList')
				}).render();
			});

			context.memo('button.ul', function() {
				return ui.button({
					contents: ui.icon(options.icons.orderedlist),
					tooltip: lang.lists.ordered + representShortcut('insertOrderedList'),
					click: context.createInvokeHandler('editor.insertOrderedList')
				}).render();
			});

			var justifyLeft = ui.button({
				contents: ui.icon(options.icons.alignLeft),
				tooltip: lang.paragraph.left + representShortcut('justifyLeft'),
				click: context.createInvokeHandler('editor.justifyLeft')
			});

			var justifyCenter = ui.button({
				contents: ui.icon(options.icons.alignCenter),
				tooltip: lang.paragraph.center + representShortcut('justifyCenter'),
				click: context.createInvokeHandler('editor.justifyCenter')
			});

			var justifyRight = ui.button({
				contents: ui.icon(options.icons.alignRight),
				tooltip: lang.paragraph.right + representShortcut('justifyRight'),
				click: context.createInvokeHandler('editor.justifyRight')
			});

			var justifyFull = ui.button({
				contents: ui.icon(options.icons.alignJustify),
				tooltip: lang.paragraph.justify + representShortcut('justifyFull'),
				click: context.createInvokeHandler('editor.justifyFull')
			});

			var outdent = ui.button({
				contents: ui.icon(options.icons.outdent),
				tooltip: lang.paragraph.outdent + representShortcut('outdent'),
				click: context.createInvokeHandler('editor.outdent')
			});

			var indent = ui.button({
				contents: ui.icon(options.icons.indent),
				tooltip: lang.paragraph.indent + representShortcut('indent'),
				click: context.createInvokeHandler('editor.indent')
			});

			context.memo('button.justifyLeft', func.invoke(justifyLeft, 'render'));
			context.memo('button.justifyCenter', func.invoke(justifyCenter, 'render'));
			context.memo('button.justifyRight', func.invoke(justifyRight, 'render'));
			context.memo('button.justifyFull', func.invoke(justifyFull, 'render'));
			context.memo('button.outdent', func.invoke(outdent, 'render'));
			context.memo('button.indent', func.invoke(indent, 'render'));

			context.memo('button.paragraph', function() {
				return ui.buttonGroup([
					ui.button({
						className: 'dropdown-toggle',
						contents: ui.icon(options.icons.align) + ' ' + ui.icon(options.icons.caret, 'span'),
						tooltip: lang.paragraph.paragraph,
						data: {
							toggle: 'dropdown'
						}
					}),
					ui.dropdown([
						ui.buttonGroup({
							className: 'note-align',
							children: [justifyLeft, justifyCenter, justifyRight, justifyFull]
						}),
						ui.buttonGroup({
							className: 'note-list',
							children: [outdent, indent]
						})
					])
				]).render();
			});

			context.memo('button.height', function() {
				return ui.buttonGroup([
					ui.button({
						className: 'dropdown-toggle',
						contents: ui.icon(options.icons.textHeight) + ' ' + ui.icon(options.icons.caret, 'span'),
						tooltip: lang.font.height,
						data: {
							toggle: 'dropdown'
						}
					}),
					ui.dropdownCheck({
						items: options.lineHeights,
						checkClassName: options.icons.menuCheck,
						className: 'dropdown-line-height',
						click: context.createInvokeHandler('editor.lineHeight')
					})
				]).render();
			});

			context.memo('button.table', function() {
				return ui.buttonGroup([
					ui.button({
						className: 'dropdown-toggle',
						contents: ui.icon(options.icons.table) + ' ' + ui.icon(options.icons.caret, 'span'),
						tooltip: lang.table.table,
						data: {
							toggle: 'dropdown'
						}
					}),
					ui.dropdown({
						className: 'note-table',
						items: [
							'<div class="note-dimension-picker">',
							'  <div class="note-dimension-picker-mousecatcher" data-event="insertTable" data-value="1x1"/>',
							'  <div class="note-dimension-picker-highlighted"/>',
							'  <div class="note-dimension-picker-unhighlighted"/>',
							'</div>',
							'<div class="note-dimension-display">1 x 1</div>'
						].join('')
					})
				], {
					callback: function($node) {
						var $catcher = $node.find('.note-dimension-picker-mousecatcher');
						$catcher.css({
								width: options.insertTableMaxSize.col + 'em',
								height: options.insertTableMaxSize.row + 'em'
							}).mousedown(context.createInvokeHandler('editor.insertTable'))
							.on('mousemove', self.tableMoveHandler);
					}
				}).render();
			});

			context.memo('button.link', function() {
				return ui.button({
					contents: ui.icon(options.icons.link),
					tooltip: lang.link.link,
					click: context.createInvokeHandler('linkDialog.show')
				}).render();
			});

			context.memo('button.picture', function() {
				return ui.button({
					contents: ui.icon(options.icons.picture),
					tooltip: lang.image.image,
					click: context.createInvokeHandler('imageDialog.show')
				}).render();
			});

			context.memo('button.video', function() {
				return ui.button({
					contents: ui.icon(options.icons.video),
					tooltip: lang.video.video,
					click: context.createInvokeHandler('videoDialog.show')
				}).render();
			});

			context.memo('button.hr', function() {
				return ui.button({
					contents: ui.icon(options.icons.minus),
					tooltip: lang.hr.insert + representShortcut('insertHorizontalRule'),
					click: context.createInvokeHandler('editor.insertHorizontalRule')
				}).render();
			});

			context.memo('button.fullscreen', function() {
				return ui.button({
					className: 'btn-fullscreen',
					contents: ui.icon(options.icons.arrowsAlt),
					tooltip: lang.options.fullscreen,
					click: context.createInvokeHandler('fullscreen.toggle')
				}).render();
			});

			context.memo('button.codeview', function() {
				return ui.button({
					className: 'btn-codeview',
					contents: ui.icon(options.icons.code),
					tooltip: lang.options.codeview,
					click: context.createInvokeHandler('codeview.toggle')
				}).render();
			});

			context.memo('button.redo', function() {
				return ui.button({
					contents: ui.icon(options.icons.redo),
					tooltip: lang.history.redo + representShortcut('redo'),
					click: context.createInvokeHandler('editor.redo')
				}).render();
			});

			context.memo('button.undo', function() {
				return ui.button({
					contents: ui.icon(options.icons.undo),
					tooltip: lang.history.undo + representShortcut('undo'),
					click: context.createInvokeHandler('editor.undo')
				}).render();
			});

			context.memo('button.help', function() {
				return ui.button({
					contents: ui.icon(options.icons.question),
					tooltip: lang.options.help,
					click: context.createInvokeHandler('helpDialog.show')
				}).render();
			});
		};

		/**
		 * image : [
		 *   ['imagesize', ['imageSize100', 'imageSize50', 'imageSize25']],
		 *   ['float', ['floatLeft', 'floatRight', 'floatNone' ]],
		 *   ['remove', ['removeMedia']]
		 * ],
		 */
		this.addImagePopoverButtons = function() {
			// Image Size Buttons
			context.memo('button.imageSize100', function() {
				return ui.button({
					contents: '<span class="note-fontsize-10">100%</span>',
					tooltip: lang.image.resizeFull,
					click: context.createInvokeHandler('editor.resize', '1')
				}).render();
			});
			context.memo('button.imageSize50', function() {
				return ui.button({
					contents: '<span class="note-fontsize-10">50%</span>',
					tooltip: lang.image.resizeHalf,
					click: context.createInvokeHandler('editor.resize', '0.5')
				}).render();
			});
			context.memo('button.imageSize25', function() {
				return ui.button({
					contents: '<span class="note-fontsize-10">25%</span>',
					tooltip: lang.image.resizeQuarter,
					click: context.createInvokeHandler('editor.resize', '0.25')
				}).render();
			});

			// Float Buttons
			context.memo('button.floatLeft', function() {
				return ui.button({
					contents: ui.icon(options.icons.alignLeft),
					tooltip: lang.image.floatLeft,
					click: context.createInvokeHandler('editor.floatMe', 'left')
				}).render();
			});

			context.memo('button.floatRight', function() {
				return ui.button({
					contents: ui.icon(options.icons.alignRight),
					tooltip: lang.image.floatRight,
					click: context.createInvokeHandler('editor.floatMe', 'right')
				}).render();
			});

			context.memo('button.floatNone', function() {
				return ui.button({
					contents: ui.icon(options.icons.alignJustify),
					tooltip: lang.image.floatNone,
					click: context.createInvokeHandler('editor.floatMe', 'none')
				}).render();
			});

			// Remove Buttons
			context.memo('button.removeMedia', function() {
				return ui.button({
					contents: ui.icon(options.icons.trash),
					tooltip: lang.image.remove,
					click: context.createInvokeHandler('editor.removeMedia')
				}).render();
			});
		};

		this.addLinkPopoverButtons = function() {
			context.memo('button.linkDialogShow', function() {
				return ui.button({
					contents: ui.icon(options.icons.link),
					tooltip: lang.link.edit,
					click: context.createInvokeHandler('linkDialog.show')
				}).render();
			});

			context.memo('button.unlink', function() {
				return ui.button({
					contents: ui.icon(options.icons.unlink),
					tooltip: lang.link.unlink,
					click: context.createInvokeHandler('editor.unlink')
				}).render();
			});
		};

		this.build = function($container, groups) {
			for (var groupIdx = 0, groupLen = groups.length; groupIdx < groupLen; groupIdx++) {
				var group = groups[groupIdx];
				var groupName = group[0];
				var buttons = group[1];

				var $group = ui.buttonGroup({
					className: 'note-' + groupName
				}).render();

				for (var idx = 0, len = buttons.length; idx < len; idx++) {
					var button = context.memo('button.' + buttons[idx]);
					if (button) {
						$group.append(typeof button === 'function' ? button() : button);
					}
				}
				$group.appendTo($container);
			}
		};

		this.updateCurrentStyle = function() {
			var styleInfo = context.invoke('editor.currentStyle');
			this.updateBtnStates({
				'.note-btn-bold': function() {
					return styleInfo['font-bold'] === 'bold';
				},
				'.note-btn-italic': function() {
					return styleInfo['font-italic'] === 'italic';
				},
				'.note-btn-underline': function() {
					return styleInfo['font-underline'] === 'underline';
				},
				'.note-btn-subscript': function() {
					return styleInfo['font-subscript'] === 'subscript';
				},
				'.note-btn-superscript': function() {
					return styleInfo['font-superscript'] === 'superscript';
				},
				'.note-btn-strikethrough': function() {
					return styleInfo['font-strikethrough'] === 'strikethrough';
				}
			});

			if (styleInfo['font-family']) {
				var fontNames = styleInfo['font-family'].split(',').map(function(name) {
					return name.replace(/[\'\"]/g, '')
						.replace(/\s+$/, '')
						.replace(/^\s+/, '');
				});
				var fontName = list.find(fontNames, function(name) {
					return agent.isFontInstalled(name) ||
						list.contains(options.fontNamesIgnoreCheck, name);
				});

				$toolbar.find('.dropdown-fontname li a').each(function() {
					// always compare string to avoid creating another func.
					var isChecked = ($(this).data('value') + '') === (fontName + '');
					this.className = isChecked ? 'checked' : '';
				});
				$toolbar.find('.note-current-fontname').text(fontName);
			}

			if (styleInfo['font-size']) {
				var fontSize = styleInfo['font-size'];
				$toolbar.find('.dropdown-fontsize li a').each(function() {
					// always compare with string to avoid creating another func.
					var isChecked = ($(this).data('value') + '') === (fontSize + '');
					this.className = isChecked ? 'checked' : '';
				});
				$toolbar.find('.note-current-fontsize').text(fontSize);
			}

			if (styleInfo['line-height']) {
				var lineHeight = styleInfo['line-height'];
				$toolbar.find('.dropdown-line-height li a').each(function() {
					// always compare with string to avoid creating another func.
					var isChecked = ($(this).data('value') + '') === (lineHeight + '');
					this.className = isChecked ? 'checked' : '';
				});
			}
		};

		this.updateBtnStates = function(infos) {
			$.each(infos, function(selector, pred) {
				ui.toggleBtnActive($toolbar.find(selector), pred());
			});
		};

		this.tableMoveHandler = function(event) {
			var PX_PER_EM = 18;
			var $picker = $(event.target.parentNode); // target is mousecatcher
			var $dimensionDisplay = $picker.next();
			var $catcher = $picker.find('.note-dimension-picker-mousecatcher');
			var $highlighted = $picker.find('.note-dimension-picker-highlighted');
			var $unhighlighted = $picker.find('.note-dimension-picker-unhighlighted');

			var posOffset;
			// HTML5 with jQuery - e.offsetX is undefined in Firefox
			if (event.offsetX === undefined) {
				var posCatcher = $(event.target).offset();
				posOffset = {
					x: event.pageX - posCatcher.left,
					y: event.pageY - posCatcher.top
				};
			} else {
				posOffset = {
					x: event.offsetX,
					y: event.offsetY
				};
			}

			var dim = {
				c: Math.ceil(posOffset.x / PX_PER_EM) || 1,
				r: Math.ceil(posOffset.y / PX_PER_EM) || 1
			};

			$highlighted.css({
				width: dim.c + 'em',
				height: dim.r + 'em'
			});
			$catcher.data('value', dim.c + 'x' + dim.r);

			if (3 < dim.c && dim.c < options.insertTableMaxSize.col) {
				$unhighlighted.css({
					width: dim.c + 1 + 'em'
				});
			}

			if (3 < dim.r && dim.r < options.insertTableMaxSize.row) {
				$unhighlighted.css({
					height: dim.r + 1 + 'em'
				});
			}

			$dimensionDisplay.html(dim.c + ' x ' + dim.r);
		};
	};

	var Toolbar = function(context) {
		var ui = $.summernote.ui;

		var $note = context.layoutInfo.note;
		var $toolbar = context.layoutInfo.toolbar;
		var options = context.options;

		this.shouldInitialize = function() {
			return !options.airMode;
		};

		this.initialize = function() {
			options.toolbar = options.toolbar || [];

			if (!options.toolbar.length) {
				$toolbar.hide();
			} else {
				context.invoke('buttons.build', $toolbar, options.toolbar);
			}

			if (options.toolbarContainer) {
				$toolbar.appendTo(options.toolbarContainer);
			}

			$note.on('summernote.keyup summernote.mouseup summernote.change', function() {
				context.invoke('buttons.updateCurrentStyle');
			});

			context.invoke('buttons.updateCurrentStyle');
		};

		this.destroy = function() {
			$toolbar.children().remove();
		};

		this.updateFullscreen = function(isFullscreen) {
			ui.toggleBtnActive($toolbar.find('.btn-fullscreen'), isFullscreen);
		};

		this.updateCodeview = function(isCodeview) {
			ui.toggleBtnActive($toolbar.find('.btn-codeview'), isCodeview);
			if (isCodeview) {
				this.deactivate();
			} else {
				this.activate();
			}
		};

		this.activate = function(isIncludeCodeview) {
			var $btn = $toolbar.find('button');
			if (!isIncludeCodeview) {
				$btn = $btn.not('.btn-codeview');
			}
			ui.toggleBtn($btn, true);
		};

		this.deactivate = function(isIncludeCodeview) {
			var $btn = $toolbar.find('button');
			if (!isIncludeCodeview) {
				$btn = $btn.not('.btn-codeview');
			}
			ui.toggleBtn($btn, false);
		};
	};

	var LinkDialog = function(context) {
		var self = this;
		var ui = $.summernote.ui;

		var $editor = context.layoutInfo.editor;
		var options = context.options;
		var lang = options.langInfo;

		this.initialize = function() {
			var $container = options.dialogsInBody ? $(document.body) : $editor;

			var body = '<div class="form-group">' +
				'<label>' + lang.link.textToDisplay + '</label>' +
				'<input class="note-link-text form-control" type="text" />' +
				'</div>' +
				'<div class="form-group">' +
				'<label>' + lang.link.url + '</label>' +
				'<input class="note-link-url form-control" type="text" value="http://" />' +
				'</div>' +
				(!options.disableLinkTarget ?
					'<div class="checkbox">' +
					'<label>' + '<input type="checkbox" checked> ' + lang.link.openInNewWindow + '</label>' +
					'</div>' : ''
				);
			var footer = '<button href="#" class="btn btn-primary note-link-btn disabled" disabled>' + lang.link.insert + '</button>';

			this.$dialog = ui.dialog({
				className: 'link-dialog',
				title: lang.link.insert,
				fade: options.dialogsFade,
				body: body,
				footer: footer
			}).render().appendTo($container);
		};

		this.destroy = function() {
			ui.hideDialog(this.$dialog);
			this.$dialog.remove();
		};

		this.bindEnterKey = function($input, $btn) {
			$input.on('keypress', function(event) {
				if (event.keyCode === key.code.ENTER) {
					$btn.trigger('click');
				}
			});
		};

		/**
		 * Show link dialog and set event handlers on dialog controls.
		 *
		 * @param {Object} linkInfo
		 * @return {Promise}
		 */
		this.showLinkDialog = function(linkInfo) {
			return $.Deferred(function(deferred) {
				var $linkText = self.$dialog.find('.note-link-text'),
					$linkUrl = self.$dialog.find('.note-link-url'),
					$linkBtn = self.$dialog.find('.note-link-btn'),
					$openInNewWindow = self.$dialog.find('input[type=checkbox]');

				ui.onDialogShown(self.$dialog, function() {
					context.triggerEvent('dialog.shown');

					$linkText.val(linkInfo.text);

					$linkText.on('input', function() {
						ui.toggleBtn($linkBtn, $linkText.val() && $linkUrl.val());
						// if linktext was modified by keyup,
						// stop cloning text from linkUrl
						linkInfo.text = $linkText.val();
					});

					// if no url was given, copy text to url
					if (!linkInfo.url) {
						linkInfo.url = linkInfo.text || 'http://';
						ui.toggleBtn($linkBtn, linkInfo.text);
					}

					$linkUrl.on('input', function() {
						ui.toggleBtn($linkBtn, $linkText.val() && $linkUrl.val());
						// display same link on `Text to display` input
						// when create a new link
						if (!linkInfo.text) {
							$linkText.val($linkUrl.val());
						}
					}).val(linkInfo.url).trigger('focus');

					self.bindEnterKey($linkUrl, $linkBtn);
					self.bindEnterKey($linkText, $linkBtn);

					$openInNewWindow.prop('checked', linkInfo.isNewWindow);

					$linkBtn.one('click', function(event) {
						event.preventDefault();

						deferred.resolve({
							range: linkInfo.range,
							url: $linkUrl.val(),
							text: $linkText.val(),
							isNewWindow: $openInNewWindow.is(':checked')
						});
						self.$dialog.modal('hide');
					});
				});

				ui.onDialogHidden(self.$dialog, function() {
					// detach events
					$linkText.off('input keypress');
					$linkUrl.off('input keypress');
					$linkBtn.off('click');

					if (deferred.state() === 'pending') {
						deferred.reject();
					}
				});

				ui.showDialog(self.$dialog);
			}).promise();
		};

		/**
		 * @param {Object} layoutInfo
		 */
		this.show = function() {
			var linkInfo = context.invoke('editor.getLinkInfo');

			context.invoke('editor.saveRange');
			this.showLinkDialog(linkInfo).then(function(linkInfo) {
				context.invoke('editor.restoreRange');
				context.invoke('editor.createLink', linkInfo);
			}).fail(function() {
				context.invoke('editor.restoreRange');
			});
		};
		context.memo('help.linkDialog.show', options.langInfo.help['linkDialog.show']);
	};

	var LinkPopover = function(context) {
		var self = this;
		var ui = $.summernote.ui;

		var options = context.options;

		this.events = {
			'summernote.keyup summernote.mouseup summernote.change summernote.scroll': function() {
				self.update();
			},
			'summernote.dialog.shown': function() {
				self.hide();
			}
		};

		this.shouldInitialize = function() {
			return !list.isEmpty(options.popover.link);
		};

		this.initialize = function() {
			this.$popover = ui.popover({
				className: 'note-link-popover',
				callback: function($node) {
					var $content = $node.find('.popover-content');
					$content.prepend('<span><a target="_blank"></a>&nbsp;</span>');
				}
			}).render().appendTo('body');
			var $content = this.$popover.find('.popover-content');

			context.invoke('buttons.build', $content, options.popover.link);
		};

		this.destroy = function() {
			this.$popover.remove();
		};

		this.update = function() {
			// Prevent focusing on editable when invoke('code') is executed
			if (!context.invoke('editor.hasFocus')) {
				this.hide();
				return;
			}

			var rng = context.invoke('editor.createRange');
			if (rng.isCollapsed() && rng.isOnAnchor()) {
				var anchor = dom.ancestor(rng.sc, dom.isAnchor);
				var href = $(anchor).attr('href');
				this.$popover.find('a').attr('href', href).html(href);

				var pos = dom.posFromPlaceholder(anchor);
				this.$popover.css({
					display: 'block',
					left: pos.left,
					top: pos.top
				});
			} else {
				this.hide();
			}
		};

		this.hide = function() {
			this.$popover.hide();
		};
	};

	var ImageDialog = function(context) {
		var self = this;
		var ui = $.summernote.ui;

		var $editor = context.layoutInfo.editor;
		var options = context.options;
		var lang = options.langInfo;

		this.initialize = function() {
			var $container = options.dialogsInBody ? $(document.body) : $editor;

			var imageLimitation = '';
			if (options.maximumImageFileSize) {
				var unit = Math.floor(Math.log(options.maximumImageFileSize) / Math.log(1024));
				var readableSize = (options.maximumImageFileSize / Math.pow(1024, unit)).toFixed(2) * 1 +
					' ' + ' KMGTP' [unit] + 'B';
				imageLimitation = '<small>' + lang.image.maximumFileSize + ' : ' + readableSize + '</small>';
			}

			var body = '<div><input type="file" class="userImg"><span class="btn btn-default upload"  ><i class="glyphicon glyphicon-plus green"></i><span>上传</span>' +
				'</span><span class="imgurl"></span> </div>' +
				'<div class="form-group" style="overflow:auto;">' +
				'<label>' + lang.image.url + ' </label>' +
				'<input class="note-image-url form-control col-md-12" type="text" / > ' +
				'</div><p>您可以输入网络图片地址，也可以上传图片</p>';

			//var body =
			//				'<div class="form-group note-group-select-from-files">' +
			//				'<label>' + lang.image.selectFromFiles + '</label>' +
			//				'<input class="note-image-input form-control" type="file" name="files" accept="image/*" multiple="multiple" />' +
			//				imageLimitation +
			//				'</div>' +
			//				'<div class="form-group" style="overflow:auto;">' +
			//				'<label>' + lang.image.url + '</label>' +
			//				'<input class="note-image-url form-control col-md-12" type="text" />' +
			//				'</div>';
			var footer = '<button href="#" class="btn btn-primary note-image-btn disabled" disabled>' + lang.image.insert + '</button>';

			this.$dialog = ui.dialog({
				title: lang.image.insert,
				fade: options.dialogsFade,
				body: body,
				footer: footer
			}).render().appendTo($container);

			//自己添加
			$container.on("click", ".upload", function() {
				var $this = $(this);
				var $parent = $(this).parent();
				var imgPath = $parent.find(".userImg").val();
				if (imgPath == "") {
					alert("请选择上传图片！");
					return;
				}
				$(this).find("span").html("上传中，请稍后");
				var data = new FormData();
				data.append('img', $parent.find(".userImg")[0].files[0]);
				$.ajax({
					url: "/admin/article/upload",
					type: "POST",
					data: data,
					cache: false,
					contentType: false,
					processData: false,
					success: function(json) {
						if (json.code == 0) {
							//$parent.find(".imgurl").html(json.url);
							$('.note-image-url').val(json.url);
						} else {
							alert(json.msg);
						}
						$this.find("span").html("上传");
					}
				})

			});

		};

		this.destroy = function() {
			ui.hideDialog(this.$dialog);
			this.$dialog.remove();
		};

		this.bindEnterKey = function($input, $btn) {
			$input.on('keypress', function(event) {
				if (event.keyCode === key.code.ENTER) {
					$btn.trigger('click');
				}
			});
		};

		this.show = function() {
			context.invoke('editor.saveRange');
			this.showImageDialog().then(function(data) {
				// [workaround] hide dialog before restore range for IE range focus
				ui.hideDialog(self.$dialog);
				context.invoke('editor.restoreRange');

				if (typeof data === 'string') { // image url
					context.invoke('editor.insertImage', data);
				} else { // array of files
					context.invoke('editor.insertImagesOrCallback', data);
				}
			}).fail(function() {
				context.invoke('editor.restoreRange');
			});
		};

		/**
		 * show image dialog
		 *
		 * @param {jQuery} $dialog
		 * @return {Promise}
		 */
		this.showImageDialog = function() {
			return $.Deferred(function(deferred) {
				var $imageInput = self.$dialog.find('.note-image-input'),
					$imageUrl = self.$dialog.find('.note-image-url'),
					$imageBtn = self.$dialog.find('.note-image-btn');

				ui.onDialogShown(self.$dialog, function() {
					context.triggerEvent('dialog.shown');

					// Cloning imageInput to clear element.
					$imageInput.replaceWith($imageInput.clone()
						.on('change', function() {
							deferred.resolve(this.files || this.value);
						})
						.val('')
					);

					$imageBtn.click(function(event) {
						event.preventDefault();

						deferred.resolve($imageUrl.val());
					});

					$imageUrl.on('keyup paste', function() {
						var url = $imageUrl.val();
						ui.toggleBtn($imageBtn, url);
					}).val('').trigger('focus');
					self.bindEnterKey($imageUrl, $imageBtn);
				});

				ui.onDialogHidden(self.$dialog, function() {
					$imageInput.off('change');
					$imageUrl.off('keyup paste keypress');
					$imageBtn.off('click');

					if (deferred.state() === 'pending') {
						deferred.reject();
					}
				});

				ui.showDialog(self.$dialog);
			});
		};
	};

	var ImagePopover = function(context) {
		var ui = $.summernote.ui;

		var options = context.options;

		this.shouldInitialize = function() {
			return !list.isEmpty(options.popover.image);
		};

		this.initialize = function() {
			this.$popover = ui.popover({
				className: 'note-image-popover'
			}).render().appendTo('body');
			var $content = this.$popover.find('.popover-content');

			context.invoke('buttons.build', $content, options.popover.image);
		};

		this.destroy = function() {
			this.$popover.remove();
		};

		this.update = function(target) {
			if (dom.isImg(target)) {
				var pos = dom.posFromPlaceholder(target);
				this.$popover.css({
					display: 'block',
					left: pos.left,
					top: pos.top
				});
			} else {
				this.hide();
			}
		};

		this.hide = function() {
			this.$popover.hide();
		};
	};

	var VideoDialog = function(context) {
		var self = this;
		var ui = $.summernote.ui;

		var $editor = context.layoutInfo.editor;
		var options = context.options;
		var lang = options.langInfo;

		this.initialize = function() {
			var $container = options.dialogsInBody ? $(document.body) : $editor;

			var body = '<div class="form-group row-fluid">' +
				'<label>' + lang.video.url + ' <small class="text-muted">' + lang.video.providers + '</small></label>' +
				'<input class="note-video-url form-control span12" type="text" />' +
				'</div>';
			var footer = '<button href="#" class="btn btn-primary note-video-btn disabled" disabled>' + lang.video.insert + '</button>';

			this.$dialog = ui.dialog({
				title: lang.video.insert,
				fade: options.dialogsFade,
				body: body,
				footer: footer
			}).render().appendTo($container);
		};

		this.destroy = function() {
			ui.hideDialog(this.$dialog);
			this.$dialog.remove();
		};

		this.bindEnterKey = function($input, $btn) {
			$input.on('keypress', function(event) {
				if (event.keyCode === key.code.ENTER) {
					$btn.trigger('click');
				}
			});
		};

		this.createVideoNode = function(url) {
			// video url patterns(youtube, instagram, vimeo, dailymotion, youku, mp4, ogg, webm)
			var ytRegExp = /^(?:https?:\/\/)?(?:www\.)?(?:youtu\.be\/|youtube\.com\/(?:embed\/|v\/|watch\?v=|watch\?.+&v=))((\w|-){11})(?:\S+)?$/;
			var ytMatch = url.match(ytRegExp);

			var igRegExp = /\/\/instagram.com\/p\/(.[a-zA-Z0-9_-]*)/;
			var igMatch = url.match(igRegExp);

			var vRegExp = /\/\/vine.co\/v\/(.[a-zA-Z0-9]*)/;
			var vMatch = url.match(vRegExp);

			var vimRegExp = /\/\/(player.)?vimeo.com\/([a-z]*\/)*([0-9]{6,11})[?]?.*/;
			var vimMatch = url.match(vimRegExp);

			var dmRegExp = /.+dailymotion.com\/(video|hub)\/([^_]+)[^#]*(#video=([^_&]+))?/;
			var dmMatch = url.match(dmRegExp);

			var youkuRegExp = /\/\/v\.youku\.com\/v_show\/id_(\w+)=*\.html/;
			var youkuMatch = url.match(youkuRegExp);

			var mp4RegExp = /^.+.(mp4|m4v)$/;
			var mp4Match = url.match(mp4RegExp);

			var oggRegExp = /^.+.(ogg|ogv)$/;
			var oggMatch = url.match(oggRegExp);

			var webmRegExp = /^.+.(webm)$/;
			var webmMatch = url.match(webmRegExp);

			var $video;
			if (ytMatch && ytMatch[1].length === 11) {
				var youtubeId = ytMatch[1];
				$video = $('<iframe>')
					.attr('frameborder', 0)
					.attr('src', '//www.youtube.com/embed/' + youtubeId)
					.attr('width', '640').attr('height', '360');
			} else if (igMatch && igMatch[0].length) {
				$video = $('<iframe>')
					.attr('frameborder', 0)
					.attr('src', igMatch[0] + '/embed/')
					.attr('width', '612').attr('height', '710')
					.attr('scrolling', 'no')
					.attr('allowtransparency', 'true');
			} else if (vMatch && vMatch[0].length) {
				$video = $('<iframe>')
					.attr('frameborder', 0)
					.attr('src', vMatch[0] + '/embed/simple')
					.attr('width', '600').attr('height', '600')
					.attr('class', 'vine-embed');
			} else if (vimMatch && vimMatch[3].length) {
				$video = $('<iframe webkitallowfullscreen mozallowfullscreen allowfullscreen>')
					.attr('frameborder', 0)
					.attr('src', '//player.vimeo.com/video/' + vimMatch[3])
					.attr('width', '640').attr('height', '360');
			} else if (dmMatch && dmMatch[2].length) {
				$video = $('<iframe>')
					.attr('frameborder', 0)
					.attr('src', '//www.dailymotion.com/embed/video/' + dmMatch[2])
					.attr('width', '640').attr('height', '360');
			} else if (youkuMatch && youkuMatch[1].length) {
				$video = $('<iframe webkitallowfullscreen mozallowfullscreen allowfullscreen>')
					.attr('frameborder', 0)
					.attr('height', '498')
					.attr('width', '510')
					.attr('src', '//player.youku.com/embed/' + youkuMatch[1]);
			} else if (mp4Match || oggMatch || webmMatch) {
				$video = $('<video controls>')
					.attr('src', url)
					.attr('width', '640').attr('height', '360');
			} else {
				// this is not a known video link. Now what, Cat? Now what?
				return false;
			}

			$video.addClass('note-video-clip');

			return $video[0];
		};


		this.show = function() {
			var text = context.invoke('editor.getSelectedText');
			context.invoke('editor.saveRange');
			this.showVideoDialog(text).then(function(url) {
				// [workaround] hide dialog before restore range for IE range focus
				ui.hideDialog(self.$dialog);
				context.invoke('editor.restoreRange');

				// build node
				var $node = self.createVideoNode(url);

				if ($node) {
					// insert video node
					context.invoke('editor.insertNode', $node);
				}
			}).fail(function() {
				context.invoke('editor.restoreRange');
			});
		};

		/**
		 * show image dialog
		 *
		 * @param {jQuery} $dialog
		 * @return {Promise}
		 */
		this.showVideoDialog = function(text) {
			return $.Deferred(function(deferred) {
				var $videoUrl = self.$dialog.find('.note-video-url'),
					$videoBtn = self.$dialog.find('.note-video-btn');

				ui.onDialogShown(self.$dialog, function() {
					context.triggerEvent('dialog.shown');

					$videoUrl.val(text).on('input', function() {
						ui.toggleBtn($videoBtn, $videoUrl.val());
					}).trigger('focus');

					$videoBtn.click(function(event) {
						event.preventDefault();

						deferred.resolve($videoUrl.val());
					});

					self.bindEnterKey($videoUrl, $videoBtn);
				});

				ui.onDialogHidden(self.$dialog, function() {
					$videoUrl.off('input');
					$videoBtn.off('click');

					if (deferred.state() === 'pending') {
						deferred.reject();
					}
				});

				ui.showDialog(self.$dialog);
			});
		};
	};

	var HelpDialog = function(context) {
		var self = this;
		var ui = $.summernote.ui;

		var $editor = context.layoutInfo.editor;
		var options = context.options;
		var lang = options.langInfo;

		this.createShortCutList = function() {
			var keyMap = options.keyMap[agent.isMac ? 'mac' : 'pc'];
			return Object.keys(keyMap).map(function(key) {
				var command = keyMap[key];
				var $row = $('<div><div class="help-list-item"/></div>');
				$row.append($('<label><kbd>' + key + '</kdb></label>').css({
					'width': 180,
					'margin-right': 10
				})).append($('<span/>').html(context.memo('help.' + command) || command));
				return $row.html();
			}).join('');
		};

		this.initialize = function() {
			var $container = options.dialogsInBody ? $(document.body) : $editor;

			var body = [
				'<p class="text-center">',
				'<a href="//summernote.org/" target="_blank">Summernote 0.7.3</a> · ',
				'<a href="//github.com/summernote/summernote" target="_blank">Project</a> · ',
				'<a href="//github.com/summernote/summernote/issues" target="_blank">Issues</a>',
				'</p>'
			].join('');

			this.$dialog = ui.dialog({
				title: lang.options.help,
				fade: options.dialogsFade,
				body: this.createShortCutList(),
				footer: body,
				callback: function($node) {
					$node.find('.modal-body').css({
						'max-height': 300,
						'overflow': 'scroll'
					});
				}
			}).render().appendTo($container);
		};

		this.destroy = function() {
			ui.hideDialog(this.$dialog);
			this.$dialog.remove();
		};

		/**
		 * show help dialog
		 *
		 * @return {Promise}
		 */
		this.showHelpDialog = function() {
			return $.Deferred(function(deferred) {
				ui.onDialogShown(self.$dialog, function() {
					context.triggerEvent('dialog.shown');
					deferred.resolve();
				});
				ui.showDialog(self.$dialog);
			}).promise();
		};

		this.show = function() {
			context.invoke('editor.saveRange');
			this.showHelpDialog().then(function() {
				context.invoke('editor.restoreRange');
			});
		};
	};

	var AirPopover = function(context) {
		var self = this;
		var ui = $.summernote.ui;

		var options = context.options;

		var AIR_MODE_POPOVER_X_OFFSET = 20;

		this.events = {
			'summernote.keyup summernote.mouseup summernote.scroll': function() {
				self.update();
			},
			'summernote.change summernote.dialog.shown': function() {
				self.hide();
			},
			'summernote.focusout': function(we, e) {
				// [workaround] Firefox doesn't support relatedTarget on focusout
				//  - Ignore hide action on focus out in FF.
				if (agent.isFF) {
					return;
				}

				if (!e.relatedTarget || !dom.ancestor(e.relatedTarget, func.eq(self.$popover[0]))) {
					self.hide();
				}
			}
		};

		this.shouldInitialize = function() {
			return options.airMode && !list.isEmpty(options.popover.air);
		};

		this.initialize = function() {
			this.$popover = ui.popover({
				className: 'note-air-popover'
			}).render().appendTo('body');
			var $content = this.$popover.find('.popover-content');

			context.invoke('buttons.build', $content, options.popover.air);
		};

		this.destroy = function() {
			this.$popover.remove();
		};

		this.update = function() {
			var styleInfo = context.invoke('editor.currentStyle');
			if (styleInfo.range && !styleInfo.range.isCollapsed()) {
				var rect = list.last(styleInfo.range.getClientRects());
				if (rect) {
					var bnd = func.rect2bnd(rect);
					this.$popover.css({
						display: 'block',
						left: Math.max(bnd.left + bnd.width / 2, 0) - AIR_MODE_POPOVER_X_OFFSET,
						top: bnd.top + bnd.height
					});
				}
			} else {
				this.hide();
			}
		};

		this.hide = function() {
			this.$popover.hide();
		};
	};

	var HintPopover = function(context) {
		var self = this;
		var ui = $.summernote.ui;

		var POPOVER_DIST = 5;
		var hint = context.options.hint || [];
		var direction = context.options.hintDirection || 'bottom';
		var hints = $.isArray(hint) ? hint : [hint];

		this.events = {
			'summernote.keyup': function(we, e) {
				if (!e.isDefaultPrevented()) {
					self.handleKeyup(e);
				}
			},
			'summernote.keydown': function(we, e) {
				self.handleKeydown(e);
			},
			'summernote.dialog.shown': function() {
				self.hide();
			}
		};

		this.shouldInitialize = function() {
			return hints.length > 0;
		};

		this.initialize = function() {
			this.lastWordRange = null;
			this.$popover = ui.popover({
				className: 'note-hint-popover',
				hideArrow: true,
				direction: ''
			}).render().appendTo('body');

			this.$popover.hide();

			this.$content = this.$popover.find('.popover-content');

			this.$content.on('click', '.note-hint-item', function() {
				self.$content.find('.active').removeClass('active');
				$(this).addClass('active');
				self.replace();
			});
		};

		this.destroy = function() {
			this.$popover.remove();
		};

		this.selectItem = function($item) {
			this.$content.find('.active').removeClass('active');
			$item.addClass('active');

			this.$content[0].scrollTop = $item[0].offsetTop - (this.$content.innerHeight() / 2);
		};

		this.moveDown = function() {
			var $current = this.$content.find('.note-hint-item.active');
			var $next = $current.next();

			if ($next.length) {
				this.selectItem($next);
			} else {
				var $nextGroup = $current.parent().next();

				if (!$nextGroup.length) {
					$nextGroup = this.$content.find('.note-hint-group').first();
				}

				this.selectItem($nextGroup.find('.note-hint-item').first());
			}
		};

		this.moveUp = function() {
			var $current = this.$content.find('.note-hint-item.active');
			var $prev = $current.prev();

			if ($prev.length) {
				this.selectItem($prev);
			} else {
				var $prevGroup = $current.parent().prev();

				if (!$prevGroup.length) {
					$prevGroup = this.$content.find('.note-hint-group').last();
				}

				this.selectItem($prevGroup.find('.note-hint-item').last());
			}
		};

		this.replace = function() {
			var $item = this.$content.find('.note-hint-item.active');

			if ($item.length) {
				var node = this.nodeFromItem($item);
				this.lastWordRange.insertNode(node);
				range.createFromNode(node).collapse().select();

				this.lastWordRange = null;
				this.hide();
				context.invoke('editor.focus');
			}

		};

		this.nodeFromItem = function($item) {
			var hint = hints[$item.data('index')];
			var item = $item.data('item');
			var node = hint.content ? hint.content(item) : item;
			if (typeof node === 'string') {
				node = dom.createText(node);
			}
			return node;
		};

		this.createItemTemplates = function(hintIdx, items) {
			var hint = hints[hintIdx];
			return items.map(function(item, idx) {
				var $item = $('<div class="note-hint-item"/>');
				$item.append(hint.template ? hint.template(item) : item + '');
				$item.data({
					'index': hintIdx,
					'item': item
				});

				if (hintIdx === 0 && idx === 0) {
					$item.addClass('active');
				}
				return $item;
			});
		};

		this.handleKeydown = function(e) {
			if (!this.$popover.is(':visible')) {
				return;
			}

			if (e.keyCode === key.code.ENTER) {
				e.preventDefault();
				this.replace();
			} else if (e.keyCode === key.code.UP) {
				e.preventDefault();
				this.moveUp();
			} else if (e.keyCode === key.code.DOWN) {
				e.preventDefault();
				this.moveDown();
			}
		};

		this.searchKeyword = function(index, keyword, callback) {
			var hint = hints[index];
			if (hint && hint.match.test(keyword) && hint.search) {
				var matches = hint.match.exec(keyword);
				hint.search(matches[1], callback);
			} else {
				callback();
			}
		};

		this.createGroup = function(idx, keyword) {
			var $group = $('<div class="note-hint-group note-hint-group-' + idx + '"/>');
			this.searchKeyword(idx, keyword, function(items) {
				items = items || [];
				if (items.length) {
					$group.html(self.createItemTemplates(idx, items));
					self.show();
				}
			});

			return $group;
		};

		this.handleKeyup = function(e) {
			if (list.contains([key.code.ENTER, key.code.UP, key.code.DOWN], e.keyCode)) {
				if (e.keyCode === key.code.ENTER) {
					if (this.$popover.is(':visible')) {
						return;
					}
				}
			} else {
				var wordRange = context.invoke('editor.createRange').getWordRange();
				var keyword = wordRange.toString();
				if (hints.length && keyword) {
					this.$content.empty();

					var bnd = func.rect2bnd(list.last(wordRange.getClientRects()));
					if (bnd) {

						this.$popover.hide();

						this.lastWordRange = wordRange;

						hints.forEach(function(hint, idx) {
							if (hint.match.test(keyword)) {
								self.createGroup(idx, keyword).appendTo(self.$content);
							}
						});

						// set position for popover after group is created
						if (direction === 'top') {
							this.$popover.css({
								left: bnd.left,
								top: bnd.top - this.$popover.outerHeight() - POPOVER_DIST
							});
						} else {
							this.$popover.css({
								left: bnd.left,
								top: bnd.top + bnd.height + POPOVER_DIST
							});
						}

					}
				} else {
					this.hide();
				}
			}
		};

		this.show = function() {
			this.$popover.show();
		};

		this.hide = function() {
			this.$popover.hide();
		};
	};


	$.summernote = $.extend($.summernote, {
		version: '0.7.3',
		ui: ui,

		plugins: {},

		options: {
			modules: {
				'editor': Editor,
				'clipboard': Clipboard,
				'dropzone': Dropzone,
				'codeview': Codeview,
				'statusbar': Statusbar,
				'fullscreen': Fullscreen,
				'handle': Handle,
				// FIXME: HintPopover must be front of autolink
				//  - Script error about range when Enter key is pressed on hint popover
				'hintPopover': HintPopover,
				'autoLink': AutoLink,
				'autoSync': AutoSync,
				'placeholder': Placeholder,
				'buttons': Buttons,
				'toolbar': Toolbar,
				'linkDialog': LinkDialog,
				'linkPopover': LinkPopover,
				'imageDialog': ImageDialog,
				'imagePopover': ImagePopover,
				'videoDialog': VideoDialog,
				'helpDialog': HelpDialog,
				'airPopover': AirPopover
			},

			buttons: {},

			lang: 'en-US',

			// toolbar
			toolbar: [
				['style', ['style']],
				['font', ['bold', 'underline', 'clear']],
				['fontname', ['fontname']],
				['color', ['color']],
				['para', ['ul', 'ol', 'paragraph']],
				['table', ['table']],
				['insert', ['link', 'picture', 'video']],
				['view', ['fullscreen', 'codeview', 'help']]
			],

			// popover
			popover: {
				image: [
					['imagesize', ['imageSize100', 'imageSize50', 'imageSize25']],
					['float', ['floatLeft', 'floatRight', 'floatNone']],
					['remove', ['removeMedia']]
				],
				link: [
					['link', ['linkDialogShow', 'unlink']]
				],
				air: [
					['color', ['color']],
					['font', ['bold', 'underline', 'clear']],
					['para', ['ul', 'paragraph']],
					['table', ['table']],
					['insert', ['link', 'picture']]
				]
			},

			// air mode: inline editor
			airMode: false,

			width: null,
			height: null,

			focus: false,
			tabSize: 4,
			styleWithSpan: true,
			shortcuts: true,
			textareaAutoSync: true,
			direction: null,

			styleTags: ['p', 'blockquote', 'pre', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6'],

			fontNames: [
				'Arial', 'Arial Black', 'Comic Sans MS', 'Courier New',
				'Helvetica Neue', 'Helvetica', 'Impact', 'Lucida Grande',
				'Tahoma', 'Times New Roman', 'Verdana'
			],

			fontSizes: ['8', '9', '10', '11', '12', '14', '18', '24', '36'],

			// pallete colors(n x n)
			colors: [
				['#000000', '#424242', '#636363', '#9C9C94', '#CEC6CE', '#EFEFEF', '#F7F7F7', '#FFFFFF'],
				['#FF0000', '#FF9C00', '#FFFF00', '#00FF00', '#00FFFF', '#0000FF', '#9C00FF', '#FF00FF'],
				['#F7C6CE', '#FFE7CE', '#FFEFC6', '#D6EFD6', '#CEDEE7', '#CEE7F7', '#D6D6E7', '#E7D6DE'],
				['#E79C9C', '#FFC69C', '#FFE79C', '#B5D6A5', '#A5C6CE', '#9CC6EF', '#B5A5D6', '#D6A5BD'],
				['#E76363', '#F7AD6B', '#FFD663', '#94BD7B', '#73A5AD', '#6BADDE', '#8C7BC6', '#C67BA5'],
				['#CE0000', '#E79439', '#EFC631', '#6BA54A', '#4A7B8C', '#3984C6', '#634AA5', '#A54A7B'],
				['#9C0000', '#B56308', '#BD9400', '#397B21', '#104A5A', '#085294', '#311873', '#731842'],
				['#630000', '#7B3900', '#846300', '#295218', '#083139', '#003163', '#21104A', '#4A1031']
			],

			lineHeights: ['1.0', '1.2', '1.4', '1.5', '1.6', '1.8', '2.0', '3.0'],

			tableClassName: 'table table-bordered',

			insertTableMaxSize: {
				col: 10,
				row: 10
			},

			dialogsInBody: false,
			dialogsFade: false,

			maximumImageFileSize: null,

			callbacks: {
				onInit: null,
				onFocus: null,
				onBlur: null,
				onEnter: null,
				onKeyup: null,
				onKeydown: null,
				onSubmit: null,
				onImageUpload: null,
				onImageUploadError: null
			},

			codemirror: {
				mode: 'text/html',
				htmlMode: true,
				lineNumbers: true
			},

			keyMap: {
				pc: {
					'ENTER': 'insertParagraph',
					'CTRL+Z': 'undo',
					'CTRL+Y': 'redo',
					'TAB': 'tab',
					'SHIFT+TAB': 'untab',
					'CTRL+B': 'bold',
					'CTRL+I': 'italic',
					'CTRL+U': 'underline',
					'CTRL+SHIFT+S': 'strikethrough',
					'CTRL+BACKSLASH': 'removeFormat',
					'CTRL+SHIFT+L': 'justifyLeft',
					'CTRL+SHIFT+E': 'justifyCenter',
					'CTRL+SHIFT+R': 'justifyRight',
					'CTRL+SHIFT+J': 'justifyFull',
					'CTRL+SHIFT+NUM7': 'insertUnorderedList',
					'CTRL+SHIFT+NUM8': 'insertOrderedList',
					'CTRL+LEFTBRACKET': 'outdent',
					'CTRL+RIGHTBRACKET': 'indent',
					'CTRL+NUM0': 'formatPara',
					'CTRL+NUM1': 'formatH1',
					'CTRL+NUM2': 'formatH2',
					'CTRL+NUM3': 'formatH3',
					'CTRL+NUM4': 'formatH4',
					'CTRL+NUM5': 'formatH5',
					'CTRL+NUM6': 'formatH6',
					'CTRL+ENTER': 'insertHorizontalRule',
					'CTRL+K': 'linkDialog.show'
				},

				mac: {
					'ENTER': 'insertParagraph',
					'CMD+Z': 'undo',
					'CMD+SHIFT+Z': 'redo',
					'TAB': 'tab',
					'SHIFT+TAB': 'untab',
					'CMD+B': 'bold',
					'CMD+I': 'italic',
					'CMD+U': 'underline',
					'CMD+SHIFT+S': 'strikethrough',
					'CMD+BACKSLASH': 'removeFormat',
					'CMD+SHIFT+L': 'justifyLeft',
					'CMD+SHIFT+E': 'justifyCenter',
					'CMD+SHIFT+R': 'justifyRight',
					'CMD+SHIFT+J': 'justifyFull',
					'CMD+SHIFT+NUM7': 'insertUnorderedList',
					'CMD+SHIFT+NUM8': 'insertOrderedList',
					'CMD+LEFTBRACKET': 'outdent',
					'CMD+RIGHTBRACKET': 'indent',
					'CMD+NUM0': 'formatPara',
					'CMD+NUM1': 'formatH1',
					'CMD+NUM2': 'formatH2',
					'CMD+NUM3': 'formatH3',
					'CMD+NUM4': 'formatH4',
					'CMD+NUM5': 'formatH5',
					'CMD+NUM6': 'formatH6',
					'CMD+ENTER': 'insertHorizontalRule',
					'CMD+K': 'linkDialog.show'
				}
			},
			icons: {
				'align': 'fa fa-align-left',
				'alignCenter': 'fa fa-align-center',
				'alignJustify': 'fa fa-align-justify',
				'alignLeft': 'fa fa-align-left',
				'alignRight': 'fa fa-align-right',
				'indent': 'fa fa-indent',
				'outdent': 'fa fa-outdent',
				'arrowsAlt': 'fa fa-arrows-alt',
				'bold': 'fa fa-bold',
				'caret': 'caret',
				'circle': 'fa fa-circle',
				'close': 'fa fa-close',
				'code': 'fa fa-code',
				'eraser': 'fa fa-eraser',
				'font': 'fa fa-font',
				'frame': 'fa fa-frame',
				'italic': 'fa fa-italic',
				'link': 'fa fa-link',
				'unlink': 'fa fa-chain-broken',
				'magic': 'fa fa-magic',
				'menuCheck': 'fa fa-check',
				'minus': 'fa fa-minus',
				'orderedlist': 'fa fa-list-ol',
				'pencil': 'fa fa-pencil',
				'picture': 'fa fa-picture-o',
				'question': 'fa fa-question',
				'redo': 'fa fa-repeat',
				'square': 'fa fa-square',
				'strikethrough': 'fa fa-strikethrough',
				'subscript': 'fa fa-subscript',
				'superscript': 'fa fa-superscript',
				'table': 'fa fa-table',
				'textHeight': 'fa fa-text-height',
				'trash': 'fa fa-trash',
				'underline': 'fa fa-underline',
				'undo': 'fa fa-undo',
				'unorderedlist': 'fa fa-list-ul',
				'video': 'fa fa-youtube-play'
			}
		}
	});

}));